"Optical" Quotes from Famous Books
 ... The Microscope and Its Revelations, gives two drawings of it. Carpenter argues that it is impossible to accept that optical lenses had ever been made by the ancients. Never occurred to him—someone a million miles or so up in the air—looking through his telescope—lens ...
— The Book of the Damned • Charles Fort
... inside. Without being a spiritualist, Jean felt that nobody but spirits could come out of a room leaving the doors locked and the keys on the inside. But for that lock, he might have even set it down to optical illusion and have persuaded himself that perhaps she had really never ...
— Mlle. Fouchette - A Novel of French Life • Charles Theodore Murray
... metal manufacturing, dental products, ceramics, pharmaceuticals, food products, precision instruments, tourism, optical instruments ...
— The 2005 CIA World Factbook • United States. Central Intelligence Agency
... An odd optical delusion has amused me these two last nights. I have been of late, for the first time, condemned to the constant use of spectacles. Now, when I have laid them aside to step into a room dimly lighted, out of the strong light which I use for writing, I have seen, or seemed to see, through ...
— The Journal of Sir Walter Scott - From the Original Manuscript at Abbotsford • Walter Scott
... change produced by the alpha rays is unknown. But the formation of the halo is not, at least in its earlier stages, attended by destruction of the crystallographic and optical properties of the medium. The optical properties are unaltered in nature but are increased in intensity. This applies till the halo has become so darkened that light is no longer transmitted under the conditions of thickness obtaining in rock sections. It ...
— The Birth-Time of the World and Other Scientific Essays • J. (John) Joly
... at Greenwich was any optical search undertaken; but Professor Airy wrote to ask M. Leverrier the same old question that he had fruitlessly put to Adams: Did the new theory explain the errors of the radius vector or not? The reply of Leverrier was both prompt and satisfactory—these ...
— The Great Events by Famous Historians, Vol. 17 • Charles Francis Horne
... which he had been labouring since 1901. But the dream of his life was not yet realised. No direct method of obtaining response record was yet obtained. Hitherto the response recorder employed was a modification of the optical lever, automatic records being secured by the very inconvenient and tedious process of photography (which again introduced complications by subjecting a plant to darkness and thereby modifying its normal excitability); and the plant was not automatically ...
— Sir Jagadis Chunder Bose - His Life and Speeches • Sir Jagadis Chunder Bose
... as to listen. You know that optical instruments have acquired great perfection; with certain instruments we have succeeded in obtaining enlargements of 6,000 times and reducing the moon to within forty miles' distance. Now, at this distance, any objects sixty feet square would be ...
— Jules Verne's Classic Books • Jules Verne
... evidence question, to quote the number of Christ's appearances, to speak of the five hundred witnesses of whom she was weary of hearing. Her mind was proof against all this; what could be more probable than that a number of devoted followers should be the victims of some optical delusion, especially when their minds were disturbed by grief. Here was a miracle supported on one side by the testimony of five hundred and odd spectators all longing to see their late Master, and contradicted on the other side by common sense and the experience of the remainder of the human ...
— We Two • Edna Lyall
... Chaldeans knew the true nature of comets, and could foretell their reappearance. "A lens of considerable power was found in the ruins of Babylon; it was an inch and a half in diameter and nine-tenths of an inch thick." (Layard's "Nineveh and Babylon," pp. 16,17.) Nero used optical glasses when he watched the fights of the gladiators; they are supposed to have come from Egypt and the East. Plutarch speaks of optical instruments used by Archimedes "to manifest to the eye the largeness of the sun." "There are actual astronomical calculations in existence, with calendars formed ...
— The Antediluvian World • Ignatius Donnelly
... analogical order, till the smallest conceivable "vital unit" is reached in the universe of organic matter. To begin, therefore, with microscopic observation, at a point in the ephemeromorphic world where that optical instrument fails to give back any intelligible answer, and synthetically follow this chain of causation upward and outward to Dr. Tyndall's "fiery cloud of mist," in which it is assumed that all the diversified possibilities and potentialities ...
— Life: Its True Genesis • R. W. Wright
... passes obliquely into another of either greater or less density it is bent at the point of incidence. This bending or breaking is called refraction. The apparent bend in a stick set sloping in a sheet of water is due to this phenomenon, as are also many mirages and other optical illusions. ...
— The Nuttall Encyclopaedia - Being a Concise and Comprehensive Dictionary of General Knowledge • Edited by Rev. James Wood
... more solidly useful articles. Various kinds of iron, copper, zinc, lead, silver, and gold ores are displayed, with oils, quartz, stones, coal, &c. There are lanterns on a new plan, microscopes, barometers, optical and philosophical instruments, farming implements, machines for melting metals;—besides hundreds of other articles which we cannot stop to notice more particularly. There are two or three very interesting ...
— The World's Fair • Anonymous
... optical illusions, a thousand aberrations of judgment, a thousand deviations, in which his thought ...
— Notre-Dame de Paris - The Hunchback of Notre Dame • Victor Hugo
... possibly know. Such a crystal has recently been found, and is now owned by Mr. Appleman. It takes about four or five years to grind and polish it. Most of the polishing, as you may or may not know, is done by the hand—smoothing it with the thumb and forefinger. The time, judgment, and skill of an optical expert is required. To-day, unfortunately, that is not cheap. The laborer is worthy of his hire, however, I suppose"—he waved a soft, full, white hand—"and forty thousand is little enough. It would be a great honor if the University ...
— The Titan • Theodore Dreiser
... on optical delusions, but Mrs. Berry described him as the Colossus who had marched them into the library, and vowed that he had recognized her and quaked. "Time ain't aged him," said Mrs. Berry, "whereas me! he've got his excuse now. I know ...
— The Shaving of Shagpat • George Meredith
... boy to seek his livelihood, he resisted the inducements which on all sides were urged upon him to come forward in the world; refusing pensions, legacies, money in many forms, he maintained himself with grinding glasses for optical instruments, an art which he had been taught in early life, and in which he excelled the best workmen in Holland; and when he died, which was at the early age of forty-four, the affection with which he was regarded showed itself singularly in the endorsement of a tradesman's ...
— Froude's Essays in Literature and History - With Introduction by Hilaire Belloc • James Froude
... and nearer, gathering and massing beneath my feet and filling the Tenaya Canyon. Then the sun shone free, lighting the pearly gray surface of the cloud-like sea and making it glow. Gazing, admiring, I was startled to see for the first time the rare optical phenomenon of the "Specter of the Brocken." My shadow, clearly outlined, about half a mile long, lay upon this glorious white surface with startling effect. I walked back and forth, waved my arms and struck all sorts of attitudes, to ...
— The Yosemite • John Muir
... position of any point of our image; hence in order to locate the image of the top of the arrow, we need to consider but one more ray from the top of the object. The most convenient ray to choose would be one passing through O, the optical center of the lens, because such a ray passes through the lens unchanged in direction, as is clear from Figure 74. The point where AC and AO meet after refraction will be the position of the top of the arrow. Similarly it can be shown that the center of the arrow will be at the point ...
— General Science • Bertha M. Clark
... Cant. vi. already quoted, "Clear as the sun," may be taken as equivalent to "spotless." That is its ordinary appearance to the naked eye, though from time to time—far more frequently than most persons have any idea—there are spots upon the sun sufficiently large to be seen without any optical assistance. Thus in the twenty years from 1882 to 1901 inclusive, such a phenomenon occurred on the average once in each week. No reference to the existence of sun-spots occurs in Scripture. Nor is this surprising, for it would not have fallen within the purpose of Scripture to record ...
— The Astronomy of the Bible - An Elementary Commentary on the Astronomical References - of Holy Scripture • E. Walter Maunder
... swiftly over the water, the moment she had ended her conference with Hetty, and had come to the determination to return. Still no ark was seen. Several times the sisters fancied they saw it, looming up in the obscurity, like a low black rock; but on each occasion it was found to be either an optical illusion, or some swell of the foliage on the shore. After a search that lasted half an hour, the girls were forced to the unwelcome conviction that the ark had departed. Most young women would have felt the awkwardness of their situation, in a physical sense, under the circumstances in which ...
— The Deerslayer • James Fenimore Cooper
... sharp and well cut, but their faces are not perfectly plane, and their slight convexity is a proof of the attention the Egyptians paid to the construction of their monuments. If their faces were plane they would appear concave to the eye; the convexity compensates for this optical illusion. The hieroglyphical inscriptions are in a perpendicular line, sometimes there is but one in the middle of the breadth of the face, and often there are three. The inscription was a commemoration by the king who had the temple ...
— Museum of Antiquity - A Description of Ancient Life • L. W. Yaggy
... smiths of Datchet were in daily requisition, and, as soon as patterns for tools and mirrors were ready, my brother went to town to have them cast, and, during the three or four months ALEXANDER could be absent from Bath, the mirrors and optical parts were ...
— Sir William Herschel: His Life and Works • Edward Singleton Holden
... without a corkscrew. I have tried it. I've about decided that the main reason why so many large lies are told about the number of trout caught all over the country, is that at the moment the sportsman pulls his game out of the water, he labors under some kind of an optical illusion, by reason of which he sees about nine trout where he ...
— Remarks • Bill Nye
... discovery of its principle. For a long time after its existence was familiar to every ball-player and spectator of the game, there were wise men who proclaimed its impossibility, who declared it to be simply an "optical delusion," and its believers the victims of the pitcher's trickery. It was only after the curve had been practically demonstrated to them, in a way which left no room for doubt, that they consented to find for it a ...
— Base-Ball - How to Become a Player • John M. Ward
... and south sides are new. The golden angel on the summit is the old one restored, with the novelty, to her, as to us, of being set on a pivot to act as a vane. I made this discovery for myself, after being puzzled by what might have been fancied changes of posture from day to day, due to optical illusion. One of the shopkeepers on the Square, who has the campanile before his eye continually, replied, however, when I asked him if the figure was fixed or movable, "Fixed." This double duty of the new campanile angel—to shine in golden glory over the city and also to tell the wind—must ...
— A Wanderer in Venice • E.V. Lucas
... learned, that Sun junior, viz., the newspaper, did sometimes indulge in fibbing. The ancient prejudice about the solar truth broke down, therefore, in that instance; and who knows but Sun senior may be detected, now that our optical glasses are so much improved, in similar practices? in which case he may have only been "keeping his hand in" when operating upon that one feature of the mouth. The rest of the portrait, we all agree, does credit to his talents, showing that he is still wide-awake, and not at ...
— Harper's New Monthly Magazine, Vol. 2, No. 8, January, 1851 • Various
... upon the black spot, and she had a great deal of trouble in the matter of focusing, pulling out and pushing in the smaller cylinder in a manner which showed that she was not accustomed to the use of this optical instrument. ...
— The Captain's Toll-Gate • Frank R. Stockton
... is a necessary part of the optical outfit. Its purpose is to collect the beam of parallel rays of light reflected by the plane mirror, by virtue of a short focus system of lenses, into a cone of large aperture (reducible at will by means of an ...
— The Elements of Bacteriological Technique • John William Henry Eyre
... delicate white hand—so placed between the light and the deed as to obscure the spot on which he was engaged. The unaccountable hand, however, was gone almost as soon as noticed." The clerk concluding that this was some optical delusion, proceeded with his work, and had come to the clause wherein the Master of Draycot disinherited his son, when again the same ghostly hand was thrust between the light ...
— Strange Pages from Family Papers • T. F. Thiselton Dyer
... which we shall find those ugliest which have in them no expression nor life whatever, but a corpse-like stare, or an indefinite meaningless glaring, as in some lights, those of owls and cats, and mostly of insects and of all creatures in which the eye seems rather an external, optical instrument than a bodily member through which emotion and virtue of soul may be expressed, (as pre-eminently in the chameleon,) because the seeming want of sensibility and vitality in a living creature is the most painful of all wants. And next to these in ugliness come the eyes that ...
— Modern Painters Volume II (of V) • John Ruskin
... optical experiments by Roger Bacon (who died in 1292), and in the sixteenth century by Digges, Baptista Porta, and Antonio de Dominis (Grant, Hist. Ph. Ast.), have led some to suppose that they invented the telescope. The writer considers that it is more likely that these notes refer to ...
— History of Astronomy • George Forbes
... great Masters in Florence and in Rome. Till we have discovered some intellectual daguerreotype, which takes off the course of thought, and the form, lineaments, and features of truth, as completely and minutely, as the optical instrument reproduces the sensible object; we must come to the teachers of wisdom to learn wisdom, we must repair to the fountain, and drink there. Portions of it may go from thence to the ends of the earth by means ...
— Harvard Classics Volume 28 - Essays English and American • Various
... by a succession of optical questions, which are discussed and answered in true scholastic style, with no little acuteness of observation. Thus: "Utrum visus fiat intus suscipiendo?" Is vision accomplished by something received into the eye? "Utrum color fit de nocte?" Does color exist at night? ...
— Gilbertus Anglicus - Medicine of the Thirteenth Century • Henry Ebenezer Handerson
... scene or scenery; an optical device which gave a distortion to the picture unless seen from a particular point; a relief, modelled to produce an ...
— Volpone; Or, The Fox • Ben Jonson
... in factory, in foundry, in laboratory, and chemical works, of which they were physically capable; in making of gauges, forging billets, making fuses, cartridges, bullets—"look what they can do," said a foreman, "ladies from homes where they sat about and were waited upon." They also made optical glass; drilled and tapped in the shipyards; renewed electric wires and fittings, wound armatures; lacquered guards for lamps and radiator fronts; repaired junction and section boxes, fire control instruments, automatic searchlights. "We can hardly believe our eyes," said another foreman, ...
— A Straight Deal - or The Ancient Grudge • Owen Wister
... amassing enough nerve to propose to Alice Faraday: and, now that he had drawn her away from the throng to this secluded nook and was about to put his fortune to the test, a horrible fear swept over him that he had overdone it. He was having optical illusions. ...
— A Damsel in Distress • Pelham Grenville Wodehouse
... intellectual energy are they inferior to any of their contemporaries, or to their own great progenitors. "Holland," says Professor Thorold Rogers, "is the origin of scientific medicine and rational therapeutics. From Holland came the first optical instruments, the best mathematicians, the most intelligent philosophers, as well as the boldest and most original thinkers. Amsterdam and Rotterdam held the printing presses of Europe in the early days of the republic; the Elzevirs were the ...
— Holland - The History of the Netherlands • Thomas Colley Grattan
... the vision immediately upon your full awakening—all well-known features of incubus," replied Mr. Berners. But again he thought of the shadow he had seen; now, however, only to dismiss the subject as an optical illusion. ...
— Cruel As The Grave • Mrs. Emma D. E. N. Southworth
... dry mornings of these regions, a curious optical phenomena may be observed, of a sunrise in the west, and sunset in the east. In either case, bright and well-defined beams rise to the zenith, often crossing to the opposite horizon. It is a beautiful feature in the firmament, and equally visible whether the horizon be cloudy ...
— Himalayan Journals (Complete) • J. D. Hooker
... The only chance of a shot is as the bird passes a gap—visible while flying a yard—just time to pull the trigger. But I would rather have that chance than have to fire between the bars of a gate; for the horizontal lines cause an optical illusion, making the object appear in a different position from what it really is in, and half the pellets are sure to be buried in the rails. Wood-pigeons, when eagerly stuffing their crops with ...
— The Open Air • Richard Jefferies
... I could be in either place by a sort of mental shift, something like staring at one of the geometrical optical illusions you can find in any psychology textbook in the chapter on illusions, and seeing it become ...
— The Gallery • Roger Phillips Graham
... figures, absolutely bodiless ideas, and forms of unsubstantial beauty came and danced before her, imprinting their momentary footsteps on beams of light. Though she had some indistinct idea of the method of these optical phenomena, still the illusion was almost perfect enough to warrant the belief that her husband possessed sway over the spiritual world. Then again, when she felt a wish to look forth from her seclusion, immediately, as if her thoughts were answered, ...
— Mosses from an Old Manse and Other Stories • Nathaniel Hawthorne
... have known these four years that I am to die at the time I mentioned, although I am sure, when I tell you how I came to know it, you will call me superstitious. For you fellows of the present day are so sceptical and matter-of-fact that you refuse to believe in anything that cannot be proved by optical inspection or by evidence. It was, as I said, just four years ago, on my ninety-third birthday, when St. John the Nepomuc appeared to me in a dream, and said—'Dionysius, my good fellow, make the best of your time! There are only five more years for you in store, and then you must die! no help ...
— Dr. Dumany's Wife • Mr Jkai
... one say that matter must obstruct or dim the senses of the soul; that a body must act as a veil to the spirit, and shut out much knowledge. It is not so here. Matter helps us in the acquisition of knowledge, as, for example, glass in optical instruments. The telescope, with its lenses, gives the eye vast compass; the microscope gives it a power, equally wonderful, of minute vision. True, in these cases it is matter helping matter—glass assisting the eye; the ...
— Catharine • Nehemiah Adams
... atmosphere is bulged out sufficiently to affect the barometer at certain hours every day,) give that peculiarity of form in certain positions of the planet in its orbit. Justice to Sir Wm. Herschel requires that his observations shall not be attributed to optical illusions. This view, however, which may be true in the case of Saturn, would be absurd when applied to the earth, as has been done within the present century. From these considerations, it is at least possible, that the density of Saturn may be very little less, or even greater ...
— Outlines of a Mechanical Theory of Storms - Containing the True Law of Lunar Influence • T. Bassnett
... enable any manipulator who is about to enlarge (or reduce) a copy any given number of times to do so without troublesome calculation. It is assumed that the photographer knows exactly what the focus of his lens is, and that he is able to measure accurately from its optical center. The use of the table will be seen from the following illustration: A photographer has a carte to enlarge to four times its size, and the lens he intends employing is one of 6 inches equivalent focus. He must therefore look for 4 on the ...
— Bromide Printing and Enlarging • John A. Tennant
... individual. Longer gastroscopes are used, when necessary, to explore a ptosed stomach. Various lens-system gastroscopes have been devised, which afford an excellent view of the walls of the air-inflated stomach. The optical system, however, interferes with the insertion of instruments, so that the open-tube gastroscope is required for the removal of gastric foreign bodies, the palpation of, or sponging secretions from, gastric ...
— Bronchoscopy and Esophagoscopy - A Manual of Peroral Endoscopy and Laryngeal Surgery • Chevalier Jackson
... loss of her bachelor roomers and, as she said to her neighbor across the street, she kept one memento of them—a thing that looked like a shell but wasn't a shell. She thought it must be one of them optical illusion things. ...
— Made in Tanganyika • Carl Richard Jacobi
... too, using an optical symbolism, we may speak of the Sulphite as being refractive—every impression made upon him is split up into component rays of thought—he sees beauty, humor, pathos, horror, and sublimity. The ...
— Are You A Bromide? • Gelett Burgess
... colors and forms of things. What is called the musical scale, or octave, is fixed in the original appointments of sound just as absolutely and definitely as the colors of the rainbow or prism in the optical properties and laws of light. And the visible objects of the world are not more certainly shaped and colored to us under the exact laws of light and the prism, than they are tempered and toned, as objects audible, to give distinctions of sound by their vibrations in ...
— Library of the World's Best Literature, Ancient and Modern, Vol. 7 • Various
... driving-rods in palm oil, and the great drops drummed down upon the awning and drowned the fire in our pipes. After these storms, as though it were being pushed up from below, the river seemed to rise in the centre, to become convex. By some optical illusion, it seemed to fall away on either hand to the depth of ...
— The Congo and Coasts of Africa • Richard Harding Davis
... was blurred, for a while, by the smoke from so much firing, which floated in thickening clouds over all the open spaces and the edges of the forest. It produced curious optical illusions. The French loomed through it, increased fourfold in numbers, every individual man magnified in size. He saw them lurid and gigantic, pulling the triggers of their rifles or muskets, or working the batteries. The cannon also grew from twelve-pounders or eighteen-pounders ...
— The Lords of the Wild - A Story of the Old New York Border • Joseph A. Altsheler
... treating such stories—the first is to deny their truth, which is, to say the least, not only grossly uncharitable, but an absurd and impertinent caprice adopted in order to reject unpleasant evidence; the second is to account for them by an optical delusion, accidentally synchronising with the event, which seems to me a most monstrous ignoring of the law of chances; a third is to account for them by the existence of some exquisite faculty, (existing in different degrees of intensity, and in some people not existing ...
— Julian Home • Dean Frederic W. Farrar
... the speculations of the old Greek thinkers. Galilei (1564-1642) enlarged the Copernican system with the aid of the telescope; and the telescope was an outcome of the new study of optics which had been inspired in Roger Bacon and other medieval scholars by the optical works, directly founded on the Greek, of the Spanish Moors. Giordano Bruno still further enlarged the system; he pictured the universe boldly as an infinite ocean of liquid ether, in which the stars, with retinues of inhabited ...
— The Story of Evolution • Joseph McCabe
... the pearl's owner; "and I like people that like the real thing. A pearl of the first water is real. There's no sham there; no deception—except the iridescence, which is, as you doubtless know, an optical illusion attributable to the intervention of rays of light reflected from microscopic corrugations of the nacreous surface. But for that our eye is to blame, not ...
— Bonaventure - A Prose Pastoral of Acadian Louisiana • George Washington Cable
... ferns growing out of every crevice in its ragged but perpendicular sides. At its feet is a cleft about 60 feet long, 16 wide, and 18 deep, full of water at a temperature of 90 degrees. This has an absolute transparency of a singular kind, and perpetrates wonderful optical illusions. Every thing put into it is transformed. The rocks, broken timber, and old cocoa nuts which lie below it, are a frosted blue; the dusky skins of natives are changed to alabaster; and as my companion, in a light print holuku, ...
— The Hawaiian Archipelago • Isabella L. Bird
... tree. To a great extent all this elaborate staging has been the death of dramatic art. Among the Elizabethans, the interest depended solely on the action and the acting, on the piece and its language. All these must be excellent. They were not yet considered inferior to those of optical effect. The Elizabethans listened with their minds, not solely ...
— Platform Monologues • T. G. Tucker
... on the other hand, the place of the different instruments will be determined by a classification according to methods, such as weighing and measuring, observations of time, optical and electrical methods of observation, ...
— Five of Maxwell's Papers • James Clerk Maxwell
... reeled, an accidental ray of light broke upon him in a way not now intelligible, or barely intelligible. Half the extreme breadth intercepted between the circle and oval was 429/100,000 of the radius, and he remembered that the "optical inequality" of Mars was also about 429/100,000. This coincidence, in his own words, woke him out of sleep; and for some reason or other impelled him instantly to try making the planet oscillate in the diameter of its epicycle ...
— Pioneers of Science • Oliver Lodge
... appearance—as I observed to William and Coleridge, something like the Tor of Glastonbury from the Dorsetshire hills. Right before us, on the flat island mentioned before, were several small single trees or shrubs, growing at different distances from each other, close to the shore, but some optical delusion had detached them from the land on which they stood, and they had the appearance of so many little vessels sailing along the coast of it. I mention the circumstance, because, with the ghostly image of Dumbarton Castle, and the ambiguous ruin on the small ...
— Recollections of a Tour Made in Scotland A.D. 1803 • Dorothy Wordsworth
... on Mars may be only an optical illusion was demonstrated in an article in the Sunday magazine of the New York Times, by means of material obtained from a report of the section for the Observation of Mars, a division of the ...
— How To Write Special Feature Articles • Willard Grosvenor Bleyer
... by a curious optical effect, the spectators always see themselves in the personages who are good, tender, generous, heroic whom we place on the boards; and in the personages who are vicious or ridiculous they never see anyone but their neighbors. How can you expect then that the truth we tell them can ...
— How to Write a Play - Letters from Augier, Banville, Dennery, Dumas, Gondinet, - Labiche, Legouve, Pailleron, Sardou, Zola • Various
... ain't fooling, Miss Rhody," said the cowpuncher earnestly. "When me and my roan come up this fur and seen we didn't see nothin', I was plumb twisted. Says I to me: 'Here, Tom Collins, is where you got to go an' see a spectacles man 'cause you got optical delusions' And I ...
— Nan Sherwood at Rose Ranch • Annie Roe Carr
... for most of the spherical-shaped objects reported, as already mentioned, is that they are meteorological or similar type balloons. This, however, does not explain reports that they travel at high speed or maneuver rapidly. But 'Saucer' men point out that the movement could be explained away as an optical illusion or actual acceleration of the balloon caused by a gas leak and later exaggerated by observers. . . . There are scores of possible explanations for the scores ...
— The Flying Saucers are Real • Donald Keyhoe
... not the sport of any hallucination, and this is no case of an optical phenomenon. This man is evidently some terrible criminal, and I have altogether failed in my duty in not arresting him myself at once, illegally, even at the ...
— The Works of Guy de Maupassant, Volume IV (of 8) • Guy de Maupassant
... developed, first by Kelvin, and subsequently by Clerk Maxwell. In 1865, two years before Faraday's death, Maxwell proposed the electro-magnetic theory of light, showing that light is an electro-magnetic disturbance. He pointed out that optical as well as electro-magnetic phenomena required a medium for their propagation, and that the properties of this medium appeared to be the same for both. Moreover, the rate at which light travels is known by actual measurement; the rate at which electro-magnetic waves are propagated can be calculated ...
— Beacon Lights of History, Volume XIV • John Lord
... way in a condition of astonishment that engendered, almost, a doubt of my eyes; for if my sight was unimpaired and myself not subject to optical or mental delusion, neither boy nor dog nor bird nor cat, nor any other object of this visible world, had entered that opened door. Was my "finest" house, then, a place of call for wandering ghosts, who came home to roost at four in ...
— Beasley's Christmas Party • Booth Tarkington
... the effect of the MIRAGE," said the doctor, "and nothing else—a simple optical phenomenon due to the unequal refraction of light by different layers of the atmosphere, ...
— Five Weeks in a Balloon • Jules Verne
... Direct Optical Projection of Electro-dynamic Lines of Force, and other Electro-dynamic Phenomena.—By Prof. J.W. MOORE—Second portion of this profusely illustrated paper, giving a great variety of experiments on the phenomena of ...
— Scientific American Supplement, No. 643, April 28, 1888 • Various
... star-gazer, and under most favourable circumstances; their minuteness, their extra-zodiacal position, and the outrageous orbits which they describe, all conspire to keep them out of human ken until they are detected by the telescope, and ascertained to be planets either by their optical appearances, or by a course of watching and comparison of their positions with catalogues of ...
— Notes and Queries, Number 186, May 21, 1853 • Various
... to the horse, has noticed his natural inclination to smell of everything which to him looks new and frightful. This is their strange mode of examining everything. And, when they are frightened at anything, though they look at it sharply, they seem to have no confidence in this optical examination alone, but must touch it with the nose before they are entirely satisfied; and, as soon as this ...
— The Arabian Art of Taming and Training Wild and Vicious Horses • P. R. Kincaid
... occasionally so do, and that we should sometimes perceive effects for which we could find no cause in the material world—no connection with matter? Yet in the whole range of human experience no such thing is known. Even the phenomena which we call optical illusions arise from certain derangements of the atomic particles of the medium through ...
— The Continental Monthly, Vol. 4, No. 5, November, 1863 • Various
... Royal Medal of the Royal Society for this memoir on Medusae, sharing this supreme distinction of scientific England with men so illustrious as Joule, the discoverer of the relation between force and heat, Stokes, the great investigator of optical physics, and Humboldt, the traveller, all of whom received medals in the same year. In making the presentation to Huxley, the Earl of Rosse, then President ...
— Thomas Henry Huxley; A Sketch Of His Life And Work • P. Chalmers Mitchell
... immense place is this church, and what an immense host must inhabit this wonderful dwelling! Optical delusion adds still more to the effect. Every proportion changes. The eye is deceived and deceives itself, at the same time, with these sublime lights and deepening shades, all calculated to increase the illusion. The man whom in the street you judged, by his surly look, ...
— Blackwood's Edinburgh Magazine, Volume 58, Number 358, August 1845 • Various
... through the body of the work, thus facilitating consultation, it is believed that this book makes a step in advance of its predecessors. The maps show all of the stars visible to the naked eye in the regions of sky represented, and, in addition, some stars that can only be seen with optical aid. The latter have been placed in the maps as guide posts in the telescopic field to assist those who are searching for faint and inconspicuous objects referred to in the text. As the book was not written for those who possess the equipment of an observatory, with ...
— Pleasures of the telescope • Garrett Serviss
... Brocken, they despaired of seeing the famous spectre, in search of which they toiled, it being visible only when the sun is a few degrees above the horizon. Haue says, he ascended thirty times without seeing it, till at length he was enabled to witness the effect of this optical delusion. For the best account of it, see the Natural Magic of Sir D. Brewster, [26] who explains the origin of these spectres, and shews how the mind is deluded among an ignorant and easily deceived people, and thus traces the birth of ...
— The Life of Samuel Taylor Coleridge - 1838 • James Gillman
... It is all an optical matter, a question of color. The pastel shades deceive him; the louder hues send him to his artillery. God help, I say, the red-haired girl! She goes into action with warning pennants flying. The dullest, blindest man can see her a mile away; ...
— Damn! - A Book of Calumny • Henry Louis Mencken
... actual work without further experiment. I have not been able by any arrangement of reflected light to get power enough to print negatives of the ordinary density, and have only succeeded by causing the light to be equally dispersed over the negative by a lens as used in the optical lantern, but the arrangements required are somewhat different to ...
— Scientific American Supplement, No. 586, March 26, 1887 • Various
... highest of human intellects; and we naturally infer that the eye has been formed by a somewhat analogous process. But may not this inference be presumptuous? Have we any right to assume that the Creator works by intellectual powers like those of man? If we must compare the eye to an optical instrument, we ought in imagination to take a thick layer of transparent tissue, with spaces filled with fluid, and with a nerve sensitive to light beneath, and then suppose every part of this layer to be continually ...
— What is Darwinism? • Charles Hodge
... whatever remained in my stomach. I sat limp and cold, conscious only of the erratic bobbing of the little vessel and the ceaseless rhythm of the oars. At last, unbelievably, the sky turned from black to gray. I could not believe it anything but an optical illusion in the endless night and I strained to dissipate whatever biliousness was affecting my vision. But it was dawn, sure enough, and soon it revealed the pettish, wallowing Channel and the fragile outline of our boat, even ...
— Greener Than You Think • Ward Moore
... mystery of the arts that were practised upon them. Such was no doubt the case with the speaking heads and statues, which were sometimes exhibited in the ancient oracles. Such was the case with certain optical delusions, which were practised on the unsuspecting, and were contrived to produce on them the effect of supernatural revelations. Such is the story of Bel and the Dragon in the book of Apocrypha, where the priests daily placed before the idol twelve measures of flour, and forty sheep, and ...
— Lives of the Necromancers • William Godwin
... was one of the cases in which Dalton, the original investigator of this optical defect, took special interest. At a later date (1859) he sent Yule, through Professor Wilson, skeins of coloured silks to name. Yule's elder brother Robert had the same peculiarity of sight, and it was also present in two earlier and two later generations of their mother's family—making ...
— The Travels of Marco Polo Volume 1 • Marco Polo and Rustichello of Pisa
... trying to force every atom of vision from my eyes. For a long time I thought they must every moment disappear and resolve themselves into the movements of the branches and prove to be an optical illusion. I searched everywhere for a proof of reality, when all the while I understood quite well that the standard of reality had changed. For the longer I looked the more certain I became that these figures were real ...
— The Willows • Algernon Blackwood
... and irregularities of form being, as it were, extinguished by the distance, and only the general figure of the condensed parts being discernible. It is under the appearance of objects of this character that all the greater globular clusters exhibit themselves in telescopes of insufficient optical power to show ...
— The World's Greatest Books - Volume 15 - Science • Various
... justly famed and to which they often treat us even when they are not in the presence of works of art, had not the professor followed up his clue with the utmost gravity, assuring me at last that no picture in the gallery was beyond the reach of optical diagnostic. Still suspicious of his good faith, I suggested, tentatively, that perhaps the discrepancies between the normal man's vision and the pictures on the wall were the result of intentional distortion on the part of the artists. At this the professor became passionately serious—"Do you mean ...
— Art • Clive Bell
... the Articulata, we may start from an optic nerve simply coated with pigment, the latter sometimes forming a sort of pupil, but destitute of lens or other optical contrivance. With insects it is now known that the numerous facets on the cornea of their great compound eyes form true lenses, and that the cones include curiously modified nervous filaments. But these organs ...
— On the Origin of Species - 6th Edition • Charles Darwin
... a private landing, small, but so remarkable that I thought for an instant the whole thing must be an optical illusion. ...
— The Chauffeur and the Chaperon • C. N. Williamson
... maker of beads for rosaries. Then there were the margaritai, who made small beads; and the fuppialume, who made large blown beads. Each man was a skilled artist, you see, and did some one special thing. The phiolari made vases, cups, and glass for windows; the cristallai optical glass; and the specchiai mirrors. No strangers were allowed to visit the glass works, and all apprentices must pass a rigid examination not only as to their skill, but as to their previous personal history. In 1495 the glass houses at Murano extended for a mile along a single ...
— The Story of Glass • Sara Ware Bassett
... did I?" says I. "Well, listen here, Sykesy! Next time I has an optical illusion of you paradin' out in any of my uniform, there'll be doin's ...
— Torchy • Sewell Ford
... has been said, blindly into vacancy. It may have been an optical illusion, it may have been a mere vagary born of an over-wrought brain; but a picture formed before him. In the distance, toward the west, he saw something that looked like a great arch of stone, a natural bridge, rugged with crags and dark with pine. ...
— The Bridge of the Gods - A Romance of Indian Oregon. 19th Edition. • Frederic Homer Balch
... and intellectual unfolding. It was not till after Alexander's conquests in the East, the extension of the Roman Empire, the invention of the mariner's compass, the discovery of America, and the circumnavigation of the globe, together with the perfection of optical instruments by the use of which the true character of the celestial bodies was demonstrated, that the cosmical idea became truly a scientific one. (Humboldt.) Thus were the partial and fragmentary notions of early peoples at length corrected, ...
— The Continental Monthly, Vol. 3, No. 1 January 1863 - Devoted To Literature And National Policy • Various
... realized I was approaching Biddy Maloney's cottage until I saw her coming out of it and I certainly hadn't thought of Biddy Maloney until my eye fell upon her. And it's a funny optical illusion that deceives one into seeing an old lady opening gates, crossing railways and limping ...
— Driftwood Spars - The Stories of a Man, a Boy, a Woman, and Certain Other People Who - Strangely Met Upon the Sea of Life • Percival Christopher Wren
... hold apart more than one thousand stimulations per second, that there is, in fact, no such thing as fusion, is a supposition which is in such striking contrast to all previous explanations of optical phenomena, that it should be accepted only if no other theory can do justice to them. It is hoped that the following pages will show that the facts do not demand such ...
— Harvard Psychological Studies, Volume 1 • Various
... eye creates the objects which it perceives. The death-blow to such superstition is only struck when we have not only proved that men have been deceived, but shown besides how they came to be deceived; when science has explained the optical delusion, and shown the physiological state in which such apparitions become visible. Ridicule will not do it. Disproof will not do it. So long as men feel that there is a spirit-world, and so long ...
— Sermons Preached at Brighton - Third Series • Frederick W. Robertson
... results at which experienced chemists have arrived in their analysis of the same mineral. For the reader will often find that crystals of a mineral determined to be the same by physical characters, crystalline form, and optical properties, have been declared by skilful analysers to be composed of distinct elements. This disagreement seemed at first subversive of the atomic theory, or the doctrine that there is a fixed and constant relation between the crystalline form and structure ...
— The Student's Elements of Geology • Sir Charles Lyell
... III. An Optical Illusion.—In the sphere of vision many very interesting facts are constantly coming to light. Sight is the most complex of the senses, the most easily deranged, and, withal, the most necessary to our normal existence. The report of the following ...
— The Story of the Mind • James Mark Baldwin
... to obliterate. The psychological illusion that our ideas and purposes are original facts and forces (instead of expressions in consciousness of facts and forces which are material) and the practical and optical illusion that everything wheels about us in this world—these are the primitive persuasions which the enemies of naturalism have always been ...
— Winds Of Doctrine - Studies in Contemporary Opinion • George Santayana
... once white, have been blackened by every species of exhalation. Such is, in all its simple modesty, the aspect of a temple consecrated to the worship of Bacchus and Terpsichore. At first, by a very natural optical illusion, we are struck by the confined space before us, but the eye, after a time, piercing through the thick atmosphere of a thousand vapours which are most inodorous, the extent becomes visible by details which escape in the first chaotic glimpse. It is the moment of creation, ...
— The Mirror of Literature, Amusement, and Instruction, Vol. 13, - Issue 377, June 27, 1829 • Various
... series of ladders, each from twenty to thirty feet long,—but with regard to those near the top, Karl had great doubts. The shelves did not seem more distant from each other than those below, but their horizontal breadth appeared less. This might possibly be an optical delusion, caused by the greater distance from which they were viewed; but if so, it would not much mend the matter for the design which Karl had in view—since the deception that would have given him an advantage in the breadth would have been against him in ...
— The Plant Hunters - Adventures Among the Himalaya Mountains • Mayne Reid
... shadows appeared to move like phantoms. Like a picture from the ghost world, it flickered for a few minutes like heat lightning, then disappeared, leaving the night as dark as before. It was a night mirage, and something more than an optical illusion. It was a rare thing on the plain. The Kid knew that it meant something. That glow was the reflection in the sky of a camp fire! Those shadows were men! The ...
— Kid Wolf of Texas - A Western Story • Ward M. Stevens
... degree in other temples, the seemingly straight lines of the building were all slightly curved, and the vertical faces inclined. This was done to correct the monotony and stiffness of absolutely straight lines and right angles, and certain optical illusions which their acute observation had detected. The long horizontal lines of the stylobate and cornice were made convex upward; asimilar convexity in the horizontal corona of the pediment counteracted the seeming concavity otherwise resulting from its meeting with the ...
— A Text-Book of the History of Architecture - Seventh Edition, revised • Alfred D. F. Hamlin
... Spherical vapor and atmospheric space give but a faint idea of its range. We find it a leading science in Physics, and having intimate relations with heat, light, electricity, magnetism, winds, water, vegetation, geological changes, optical effects, pneumatics, geography,—and with climate, controlling the pursuits and affecting the character of the human race. It is so intimately blended, indeed, with the other matters here named, as scarcely to have any positive ...
— Atlantic Monthly Vol. 6, No. 33, July, 1860 • Various
... universities, and won the degrees of Doctor of Medicine and Doctor of Philosophy. Besides acquiring a knowledge of seven languages he gained a brilliant reputation for proficiency in the branch of optical surgery. For a time he was the leading assistant in the office of a world-renowned specialist ...
— Friars and Filipinos - An Abridged Translation of Dr. Jose Rizal's Tagalog Novel, - 'Noli Me Tangere.' • Jose Rizal
... scientific and the artistic efforts of the new and the old world, we may tell the history of the moving pictures by the following dates and achievements. In the year 1825 a Doctor Roget described in the "Philosophical Transactions" an interesting optical illusion of movement, resulting, for instance, when a wheel is moving along behind a fence of upright bars. The discussion was carried much further when it was taken up a few years later by a master ...
— The Photoplay - A Psychological Study • Hugo Muensterberg
... observations. They are stupendous, they are wonderful, but whether they are true or false I cannot tell." He concludes, "I will never concede his four new planets to that Italian from Padua, though I die for it." So he published a pamphlet asserting that reflected rays and optical illusions were the sole cause of the appearance, and that the only use of the imaginary planets was to gratify Galileo's ...
— The Great Events by Famous Historians, Volume 11 • Various
... was so extensively employed by the Pueblo Indians for the manufacture of various utensils, has proved to be composed largely of quartz, intermingled with which is a fine, fibrous, radiated substance, the optical properties of which demonstrate it to be fibrolite. In addition, the rock is filled with minute crystals of octahedral form which are composed of magnetite, and scattered through the rock are minute yellow crystals of rutile. The red coloration which these specimens ...
— Illustrated Catalogue Of The Collections Obtained From The Indians Of New Mexico And Arizona In 1879 • James Stevenson
... equidistant between yellow-green and blue-violet, so if for red and blue-green; red, yellow-green and blue-violet be substituted the combination loses its obviousness and a certain harshness without losing anything of its brilliance, or without departing from the optical law involved. Such a combination corresponds to a diminished triad ...
— Architecture and Democracy • Claude Fayette Bragdon
... had sought seclusion before. By this time he had ceased to devote himself to pure mathematics, and in company with his friends Mersenne and Mydorge was deeply interested in the theory of the refraction of light, and in the practical work of grinding glasses of the best shape suitable for optical instruments. But all the while he was engaged with reflections on the nature of man, of the soul and of God, and for a while he remained invisible even to his most familiar friends. But their importunity made a hermitage in Paris impossible; a graceless friend even ...
— Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 2 - "Demijohn" to "Destructor" • Various
... crisp mornings a striking optical effect may frequently be observed from the shadows of the higher mountains while the sunbeams are pouring past overhead. Then every insect, no matter what may be its own proper color, burns white in the light. Gauzy-winged ...
— The Mountains of California • John Muir
... dessert that would have frightened a strong man after such a dinner as had preceded it. Not so the Ruggleses—for a strong man is nothing to a small boy—and they kindled to the dessert as if the turkey had been a dream and the six vegetables an optical delusion. There was plum-pudding, mince-pie, and ice-cream, and there were nuts, and raisins, and oranges. Kitty chose ice-cream, explaining that she knew it "by sight," but hadn't never tasted none; but all the rest took the entire variety, ...
— The Birds' Christmas Carol • Kate Douglas Wiggin
... variety in the size will indicate a corresponding difference in the distance, and will measure that difference. Nor could we imagine any exception to these inferences from A or from B, whichever of the two were assumed, unless through optical laws that might not equally affect objects under different circumstances; I mean, for instance, that might suffer a disturbance as applied under hypoth. B, to different depths in space, or under hypoth. A, to different arrangements of structure in the ...
— Narrative And Miscellaneous Papers • Thomas De Quincey
... definite ability to do this, and each differs from every other in the amount of bending which it can bring about under given conditions. The accurate determination of the amount of bending in a given case requires very finely constructed optical instruments and also a knowledge of how to apply a certain amount of mathematics. However, all this part of the work has already been done by competent scientists, and tables have been prepared by them, in which the values for each material ...
— A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public • Frank Bertram Wade
... a flutter, and all was over. The great conjurer had at last performed an illusion that was not optical—an act not mentioned on ...
— The Call of the Beaver Patrol - or, A Break in the Glacier • V. T. Sherman
... almost as he was taken to see the King driving out of Buckingham Palace. Hence the first effect of the enlargement of the armies was something almost like a fairy-tale—almost as if the streets were crowded with kings, walking about and wearing crowns of gold. This merely optical vision of the revolution was but the first impression of a reality equally vast and new. The first levies which came to be called popularly Kitchener's Army, because of the energy and inspiration with ...
— Lord Kitchener • G. K. Chesterton
... and helplessly shook his head in a horizontal direction. It was wonderful how Mrs. Crowl towered over Mr. Crowl, even when he stood up in his shoes. She measured half an inch less. It was quite an optical illusion. ...
— The Big Bow Mystery • I. Zangwill
... there was nothing the matter with the brain. It was only my eyes that had been deceived; they had had a vision, one of those visions which lead simple folk to believe in miracles. It was a nervous seizure of the optical apparatus, nothing more; the eyes were ...
— Maupassant Original Short Stories (180), Complete • Guy de Maupassant
... accustomed to the use of a microscope. The eye-piece of a microscope (fig. 44a, A) unscrews at a, showing a diaphragm at b, which will serve as a support for an eye-piece micrometer. This last, B, is a scale engraved on glass, and may be purchased of any optical instrument maker, though it may be necessary to send the eye-piece to have it properly fitted. When resting on the diaphragm it is in focus for the upper lens, so that on looking through the microscope, the scale is clearly seen in whatever position ...
— A Textbook of Assaying: For the Use of Those Connected with Mines. • Cornelius Beringer and John Jacob Beringer
... impression, showing that they did not receive the message through the cord and spinal nerves. He then divided the sympathetic nerves, and the chromatophores lost at once the power of contraction; he thus demonstrated that the sympathetic nerves were the transmitters of the optical ...
— The Dawn of Reason - or, Mental Traits in the Lower Animals • James Weir
... colour'd Glass to screen my eye with; But that which I desire may be taken notice of, because we may elsewhere have occasion to reflect upon it, and because it seems not agreeable to what Anatomists and Optical Writers deliver, touching the relation of the two eyes to each other, is this circumstance, that though my Right eye, with which I looked thorow the Telescope, were thus affected by the over-strong impression of the light, yet when the flame of a Candle, or some other bright object appear'd ...
— Experiments and Considerations Touching Colours (1664) • Robert Boyle
... them, there are ever some, to cheer our transitory existence here. There are dark shadows on the earth, but its lights are stronger in the contrast. Some men, like bats or owls, have better eyes for the darkness than for the light. We, who have no such optical powers, are better pleased to take our last parting look at the visionary companions of many solitary hours, when the brief sunshine of the world is ...
— The Pickwick Papers • Charles Dickens
... ACHROMATIC. An optical term applied to those telescopes in which aberration of the rays of light, and the colours dependent thereon, are ...
— The Sailor's Word-Book • William Henry Smyth
... Swedenborg used to wear; not the smaller pair—those he gave to Hans Christian Andersen—but the large pair, and these seem to have got mislaid. I think they are Spinoza's make. You know, he was an optical-glass maker by profession, and the best we ever had. See if you can get them ...
— Reviews • Oscar Wilde
... the shift of an inch in the position of a telescope. It was her telescope in fact that had gained in range—just as her danger lay in her exposing herself to the observation by the more charmed, and therefore the more reckless, use of this optical resource. Not under any provocation to produce it in public was her unremitted rule; but the difficulties of duplicity had not shrunk, while the need of it had doubled. Humbugging, which she had so practised with her father, had been a comparatively ...
— The Golden Bowl • Henry James
... tales as these they lured on the Pole from day to day; and at last persuaded him to be a witness of their mysteries. Whether they played off any optical delusions upon him; or whether, by the force of a strong imagination, he deluded himself, does not appear; but certain it is, that he became a complete tool in their hands, and consented to do whatever they wished him. Kelly, at these interviews, placed himself at a certain distance from the ...
— Memoirs of Extraordinary Popular Delusions - Vol. I • Charles Mackay
... rested doubtless on the bottom of the ocean. Every fantastic form was there; there seemed in the distance cities and palaces as white as chalk; pillars and reversed cones, pyramids and mounds of every shape, valleys and lakes; and under the influence of the optical delusions of the locality, green fields and meadows, and tossing seas. Here the whole party rested soundly, and pushed on hard the next day ...
— International Weekly Miscellany, Vol. 1, No. 5, July 29, 1850 • Various
... to by phantasmagorists is further increased by the mystery that conceals, from the eyes of the public, their operations and optical instruments: but it is easy for the showman to snatch from them this superiority, and to strengthen the illusion for the children whom you choose to amuse with this sight. For that purpose, he has only to change the arrangement of the sheet, by requiring it to be suspended from the ...
— Paris As It Was and As It Is • Francis W. Blagdon
... been passing a few weeks in Paris, and the papers dwell upon the marvellous preservation of his powers, which seem to baffle the attacks of time. Galignani says he "read at the Academy of Sciences, before a most crowded auditory, a paper on the optical and mathematical inquiries which have occupied his time during his late residence at Cannes. His lordship accompanied the reading of this memoir with numerous demonstrations on the board, and for upwards of an hour captivated the attention of his hearers. MM. Arago, Biot, Tenard, and other ...
— The International Monthly, Volume 5, No. 3, March, 1852 • Various
... were mathematical, optical, cosmographical, and astronomical,—but chiefly astronomical. Two or three of his principal works are the "Cosmographic Mystery," (Mysterium Cosmographicum,) the "New Astronomy," (Astronomia Nova, seu Physica Caelestis,) ...
— Atlantic Monthly, Vol. 5, No. 30, April, 1860 • Various
... yet living at Killarney, who solemnly declare that they have seen the chieftain on his May-morning ride. But these, if honest persons, have doubtless been deceived by singular appearances in the atmosphere, called optical illusions, or mirages. ...
— Stories and Legends of Travel and History, for Children • Grace Greenwood
... threaded its way among the blocks of ice which were carried along in the current of the Angara. A moving panorama was displayed on both sides of the river, and, by an optical illusion, it appeared as if it was the raft which was motionless before a succession of picturesque scenes. Here were high granite cliffs, there wild gorges, down which rushed a torrent; sometimes appeared a clearing with a still smoking village, then thick pine forests blazing. ...
— Michael Strogoff - or, The Courier of the Czar • Jules Verne
... has observed the hereditary tendency in this direction to be heightened, and some of the children to be myopic at an earlier age or in a higher degree than their parents. Thirdly, squinting is a familiar example of hereditary transmission: it is frequently a result of such optical defects as have been above mentioned; but the more primary and uncomplicated forms of it are also sometimes in a marked degree transmitted in a family. Fourthly, CATARACT, or opacity of the crystalline ...
— The Variation of Animals and Plants under Domestication - Volume I • Charles Darwin
... his ways. One is always reminded that he is a barbarian, that he is ignorant, that he is dirty. He is possibly a barbarian in one way, that he can differentiate good from bad, real comfort from "optical illusions" or illusions of any other kind, a thing highly civilised people seem generally unable to do. This is particularly noticeable in Russian railway travelling,—probably the best and cheapest in ...
— Across Coveted Lands - or a Journey from Flushing (Holland) to Calcutta Overland • Arnold Henry Savage Landor
... complacent control of these overall complexities that must be met with automatic accuracy was the Starrett Analogue/Digital Computer, Optical Wave type 44-63, irreverently referred to by the acronymically-minded as Sad Cow, though more frequently as the Sacred Cow, or ...
— Where I Wasn't Going • Walt Richmond
... seen, just under his nose, a very long pair of soles inserted in the apertures—that sight had only confused and bewildered him, unaccompanied as it ought to have been with the trunk and face of Lenny Fairfield. Those soles seemed to him optical delusions, phantoms of the overheated brain; but now, catching hold of Stirn, while the Parson in equal astonishment caught hold of him—the Squire faltered out, "Well, this beats cock-fighting! The man's as mad as a March hare, and has taken ...
— The International Magazine, Volume 2, No. 3, February, 1851 • Various
... model of those formal but reverend manners which make what is called a gentleman of the old school, so called under an impression that the style is passing away, but which, I suppose, is an optical illusion, as there are always a few more of the class remaining, and always a few young men to ...
— The Autocrat of the Breakfast-Table • Oliver Wendell Holmes, Sr. (The Physician and Poet not the Jurist)
... "Optical density! The whole subject is a network of riddles—a network with solutions glimmering elusively through. And being but two-and-twenty and full of enthusiasm, I said, 'I will devote my life to this. This is worth while.' You know what fools ...
— The Invisible Man • H. G. Wells
... machinery, connectors for audio and video, parts for motor vehicles, dental products, hardware, prepared foodstuffs, electronic equipment, optical products ...
— The 2004 CIA World Factbook • United States. Central Intelligence Agency
... glassware, since it resists the action of reagents better than the softer sodium glass. If lead oxide is substituted for the whole or a part of the lime, the glass is very soft, but has a high index of refraction and is valuable for making optical instruments and artificial jewels. ...
— An Elementary Study of Chemistry • William McPherson
... is an optical deception, depending upon principles which I cannot well explain to you till you know more of that branch of science. But what a number of new ideas this afternoon's walk has afforded you! I do not wonder that you found it ...
— Young Folks Treasury, Volume 3 (of 12) - Classic Tales And Old-Fashioned Stories • Various
... would all round were tree-ferns and palms with long drooping creepers, and a blaze of brilliant orchids. Smoking-room, house, England, all were gone, and he sat on a settee in the heart of a virgin forest of the Amazon. It was no mere optical delusion or trick. He could see the hot steam rising from the tropical undergrowth, the heavy drops falling from the huge green leaves, the very grain and fibre of the rough bark which clothed the trunks. Even as he gazed a green mottled snake curled noiselessly over a branch above his head, ...
— The Doings Of Raffles Haw • Arthur Conan Doyle
... common, on, As a more rare and rich phenomenon. He wisely said that the sensorium Is for the eyes a great emporium, To which these noted picture-stealers Send all they can and meet with dealers. In many an optical proceeding The brain, he said, showed great good breeding; For instance, when we ogle women (A trick which Barbara tutored him in), Although the dears are apt to get in a Strange position on the retina, Yet ...
— The Complete Poems of Sir Thomas Moore • Thomas Moore et al
... paternal and maternal grandparents emigrated from Scotland together and are said to have landed the day before the Battle of Bunker Hill. The McAllisters of Philadelphia (father and son) were famous as makers of optical and mathematical instruments, and the son was the first to study and fit astigmatic lenses, and was also the introducer of the system of numbering buildings according to the numbers of the streets, ...
— Scotland's Mark on America • George Fraser Black
... Miriam stood between him and the bushes. He saw her distinctly for a moment, and then she vanished from his gaze. He pursued her in the direction she had taken, but no trace of her could he find. Then, recollecting how very ill she was, he became convinced that he had become subject to an optical illusion. But he had now become fearful and nervous, and dared not return to the spot to renew the search. And thus it was that the ring was left upon the twig of alder to ...
— The Continental Monthly, Vol. III, No. V, May, 1863 - Devoted to Literature and National Policy • Various
... which the material is utilised in the best conditions of resistance. For a standard with ends has been substituted a standard with marks, which permits much more precise definition and can be employed in optical processes of observation alone; that is, in processes which can produce in it no deformation and no alteration. Moreover, the marks are traced on the plane of the neutral fibres[2] exposed, and the invariability of ...
— The New Physics and Its Evolution • Lucien Poincare
... time to reach the point of observation, and we all waited below, how impatiently may be imagined. What if the look-out were mistaken, if some optical delusion?—But West, at all events, would ...
— An Antarctic Mystery • Jules Verne
... if you like to call it so; say, rather, a dream in the instant before unconsciousness. Such a babe as this knows no distinction between dreams and realities—between the momentarily disordered mental vision and the ordinary objects of optical seeing." ...
— A Sheaf of Corn • Mary E. Mann
... "It was an optical illusion!" While the other contended that, "It was an acoustical illusion!" And so they disputed. Something, however, was, it will be seen, common to both "It was ...
— Rubur the Conqueror • Jules Verne
... of which furnishes an excellent quality. It is highly prized by mineralogists on account of its double refractive qualities. If a piece of this mineral be placed over a word, the letters forming it will appear double. Iceland spar is used chiefly in the optical instrument known ...
— Wealth of the World's Waste Places and Oceania • Jewett Castello Gilson
... operate, may be removed from the carriage and placed on the ground at a distance of about a hundred yards from the machine, and be connected therewith by a conductor. Col. Mangin's projector consists of a glass mirror with double curvature, silvered upon its convex face. It possesses so remarkable optical properties that it has been adopted by nearly all powers. The fascicle of light that it emits has a perfect concentration. In front of the projector there are two doors. The first of these, which is plane ...
— Scientific American Supplement, No. 488, May 9, 1885 • Various
... upon the uppers. Where the instep is defective or totally absent, a pretence at one may be made by blacking that portion of the sole of the foot that is immediately adjacent to the heel. This causes a kind of optical illusion which is ...
— Social Life - or, The Manners and Customs of Polite Society • Maud C. Cooke
... I scanned using Optical Character Recognition was printed in the 1888-92 period by John W. Lovell of 150 Worth St. New York. Lovell has been described as a book pirate who tried to form a monopoly in the cheap uncopyrighted book trade. The US copyright laws were rather weak in the nineteenth ...
— Tom Brown at Oxford • Thomas Hughes
... thinking that I was the victim of some hallucination, or that the refraction from the intense light produced an optical delusion; and, as I did so, the flaming pillar slowly twisted and thundered off whithersoever it passes to in the bowels of the great earth, leaving Ayesha standing ...
— She • H. Rider Haggard
... left eye, so swollen now that it was closed to a mere slit. There was no optical delusion about its nomenclature and in diameter and chromatic depth it was at the head of its class; in fact, it gave promise of being by daylight in a class by itself. It was the sort of decoration which could be relied upon implicitly to fire the imagination of misguided acquaintances ...
— Every Man for Himself • Hopkins Moorhouse
... hypothesis is exposed to some special objections. It requires no small strength of nerve steadily to conceive not only of the variation, but of the formation of the organs of an animal through cumulative variation and natural selection. Think of such an organ as the eye, that most perfect of optical instruments, as so produced in the lower animals and perfected in the higher! A friend of ours, who accepts the new doctrine, confesses that for a long while a cold chill came over him whenever he thought of the eye. He has at length got over that stage ...
— Atlantic Monthly Volume 6, No. 34, August, 1860 • Various
... ocean appears either flat or slightly concave, and aeronauts declare that this apparent concavity becomes more marked, the higher they ascend. It is only at those rare periods when the air is so miraculously clear as to produce the effect of no air—rendering impossible the slightest optical illusion—that our eyes can see things as they really are. So pure was the atmosphere to-day, that, at meridian, the moon, although a thin sickle, three days distant from the sun, shone ...
— The Lands of the Saracen - Pictures of Palestine, Asia Minor, Sicily, and Spain • Bayard Taylor
... Moscow before seeing it, may be worthy of repetition. The general colors of the buildings, roofs, and churches are light, gay, and sparkling, so that the whole, taken in one sweep of the eye, presents an exceedingly brilliant appearance, more like some well-contrived and highly-wrought optical illusions in a theatre—such, for example, as the fairy scenery of the "Prophete"—than any thing I can now remember. The vast extent of the city, compared with its population (the circuit of its outer wall being ...
— The Land of Thor • J. Ross Browne
... farther and more essential ground of difference in system of shadow between the Flemish and Italian colorists. It is a well-known optical fact that the color of shadow is complemental to that of light: and that therefore, in general terms, warm light has cool shadow, and cool light hot shadow. The noblest masters of the northern and southern schools respectively adopted these contrary keys; and while the Flemings raised their ...
— On the Old Road Vol. 1 (of 2) - A Collection of Miscellaneous Essays and Articles on Art and Literature • John Ruskin
... them, do you? I suspected them at once. Still I pretended to turn Martha's whole story into a joke, and tried to explain to her how the darkness made us liable to have all kinds of optical illusions; so that when I left, and a servant was sent with a candle to light me on my way, the countess was quite sure that I had no suspicion. I had none; but I had more than that. As soon as I entered the garden, therefore, ...
— Within an Inch of His Life • Emile Gaboriau
... her trunk going was surpassed only by the astonishment of the neighbors, who all but broke the glass in their various windows as they pressed against it to convince themselves that the sight was not an optical illusion. ...
— The Fighting Shepherdess • Caroline Lockhart
... but the blue sky above, and the deep blue water below. Hence it was termed by the geographers of old, Aprositus, or the Inaccessible; while modern navigators have called its very existence in question, pronouncing it a mere optical illusion, like the Fata Morgana of the Straits of Messina; or classing it with those unsubstantial regions known to mariners as Cape Flyaway, and the ...
— Wolfert's Roost and Miscellanies • Washington Irving
... him the first thing to-morrow; and unless he is an optical illusion—which I vow I half believe is the case—I will come at the truth in spite of your demoniac friend, ...
— The Midnight Queen • May Agnes Fleming
... afford. There are a great many excellent makes of lenses on the market and even the stock types that are supplied with moderate-priced cameras are of very good quality. The two distinct types of lenses are the "rapid rectilinear" and the "anastigmatic," which names refer to their optical properties in distributing the light. For our purpose all we need to know is that the higher price we pay the better our lenses will be, and in addition to this the further fact that the best kind of results can be obtained by any lens provided that we do not try to force it to do work for ...
— Outdoor Sports and Games • Claude H. Miller |
