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Concave   Listen
verb
Concave  v. t.  (past & past part. concaved; pres. part. concaving)  To make hollow or concave.






Collaborative International Dictionary of English 0.48








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"Concave" Quotes from Famous Books



... ear-like appendage or, in antennae, with the basal joint distended into a concave, plate-like ear which envelops the rest of ...
— Explanation of Terms Used in Entomology • John. B. Smith

... Hansen and Lehmann in their experiments consists of two large concave reflectors. These are placed at a convenient distance, one facing the other, so that two experimenters may be seated, the first having his mouth at the focal point of one reflector, the second with his ear at the focal point of the other. As the first experimenter repeats mentally any words ...
— The Psychology of Singing - A Rational Method of Voice Culture Based on a Scientific Analysis of All Systems, Ancient and Modern • David C. Taylor

... positions the Germans had retained a strong system of trenches forming a salient almost triangular in shape, which the French nicknamed "la Poche" (the Pocket). During the whole year a war of mining had been going on, and the region, which was broken up by concave constructions and intersected in all directions by trenches and alleys of communication, constituted an attacking ground all the more difficult because to the north of la Poche the rather thickly-wooded Trou Bricot, the edges of which had been put in ...
— The Story of the Great War, Volume IV (of 8) • Francis J. (Francis Joseph) Reynolds, Allen L. (Allen Leon)

... Gama's bands the quiv'ring trumpet blow, Thick o'er the wave the crowding barges row, The Moorish flags the curling waters sweep, The Lusian mortars thunder o'er the deep; Again the fiery roar heaven's concave tears, The Moors astonished stop their wounded ears; Again loud thunders rattle o'er the bay, And clouds of smoke wide-rolling blot the day; The captain's barge the gen'rous king ascends, His arms ...
— The Book of the Epic • Helene A. Guerber

... other at their heels. The resemblance extended to his astonished countenance. His big chest heaved. Like many another wounded giant before him, he experienced the insufficiency of interjections to solace pain. For them, however, the rocks were handy to fling, the trees to uproot; heaven's concave resounded companionably to their bellowings. Relief of so concrete a kind is not to be obtained ...
— The Shaving of Shagpat • George Meredith

... a mysterious device resembling two hard rubber shoe horns, joined in the centre by a concave piece of metal. ...
— Andy the Acrobat • Peter T. Harkness

... This cup, with a concave body and a baluster stem with a square foot, is marked "Moulton" and is in the style of Ebenezer Moulton who worked in ...
— Presentation Pieces in the Museum of History and Technology • Margaret Brown Klapthor

... The speaker tapped his concave chest. "Bum lungs. I came down here to shuffle off, and I'm waiting for it to happen. What brings you ...
— Rainbow's End • Rex Beach

... opposing fire slackening every minute,—on, on, through the abatis and ditch, up the steep bank, over the parapet into the rebel camp that had but just been deserted. Then and there the long tried and ever faithful soldiers of the Republic saw daylight—and such a shout as tore the concave of that morning sky it were worth dying to hear." The same jubilant success was attending the whole army, though not without sharp resistance on the part of the enemy ...
— The County Regiment • Dudley Landon Vaill

... compelled to pursue. Not only have they to cross wide snow-covered districts, but frequently to pass across frozen expanses of water. To enable them to do this in the winter, the frog of the foot is almost entirely absorbed, and the edges of the hoof, now quite concave, grow out in sharp ridges, each division on the under surface presenting the appearance of a huge mussel-shell, and serving the office of natural skates. So rapidly does the shell increase, that the frog does not fill up again till spring, when the antlers bud ...
— The Western World - Picturesque Sketches of Nature and Natural History in North - and South America • W.H.G. Kingston

... vibrations shake, While on the surface of the neighbouring lake, Of shrubs and willows, wash'd from every stain, The trembling branches glitter once again; Again the peasant in its bosom sees The heaven's blue concave and ...
— Translations of German Poetry in American Magazines 1741-1810 • Edward Ziegler Davis

... Tish frowned him down. "It's awfully fetching, and beauty half-revealed, you know. Do you suppose my breastbone will ever straighten out again? It's concave from stooping." ...
— Tish, The Chronicle of Her Escapades and Excursions • Mary Roberts Rinehart

... come the triangular PEDIMENTS or gables, formed by the sloping roof and adapted for groups of sculpture. The pediment is protected above by a "raking" cornice, which has not the same form as the horizontal cornice, the principal difference being that the under surface of the raking cornice is concave and without mutules. Above the raking cornice comes a SIMA or gutter-facing, which in buildings of good period has a curvilinear profile. This sima is sometimes continued along the long sides of the building, and sometimes ...
— A History Of Greek Art • F. B. Tarbell

... caused by any weight, applied transversely, to a beam supported at both ends, is directly as the breadth, and square of the depth, and inversely as the length. It causes the beam to be depressed towards the middle of its length, forming a curve, concave to the horizontal and below it. In assuming this form—the fibres of the upper part of the beam are compressed, and those of the lower part are extended—consequently there must be some line situated between ...
— Instructions on Modern American Bridge Building • G. B. N. Tower

... remarkable at a distance; but a truly sublime effect is produced when the stranger is placed under its awful roof with his back against the concave chalk: for he then sees above him a magnificent Arch two hundred feet in height and overhanging the beach at least one hundred and eighty!—yet so true, nay, even elegant is the sweep, that it rather resembles the stupendous ...
— Brannon's Picture of The Isle of Wight • George Brannon

... Father and I paid a visit, long anticipated, to the Great Globe in Leicester Square. This was a huge structure, the interior of which one ascended by means of a spiral staircase. It was a poor affair; that was concave in it which should have been convex, and my imagination was deeply affronted. I could invent a far better Great Globe than that in my ...
— Father and Son • Edmund Gosse

... Its song of birds, a home where peace might reign supreme. High rose the copper-bolted portal, and within Two colonnades supported on strong omoplates The vaulted canopy, and beautiful it hung Above the temple, like a concave shield of gold. At farthest end stood Balder's altar. It was hewn From one huge block of northern granite: round it coiled A graven serpent, covered o'er with written runes, - Profoundest thoughts from Vala and from Ha'vama'l; But ...
— Fridthjof's Saga • Esaias Tegner

... condenser is attached a gymbal carrying a reversible circular frame with a plane mirror on one side and a concave mirror on the other (Fig. 40, g). The plane mirror is that usually employed, but occasionally, as for example when using low powers and with the condenser racked down and thrown out of the optical axis, the concave mirror ...
— The Elements of Bacteriological Technique • John William Henry Eyre

... large cylindric stone of a red colour, wrought perfectly round. The one they measured, which was not by far the largest, was fifty-two inches high, and sixty-six in diameter. In some, the upper corner of the cylinder was taken off in a sort of concave quarter-round, but in others the cylinder ...
— A Voyage Towards the South Pole and Round the World, Volume 1 • James Cook

... parts of a bivalve shell are like thin saucers, concave inside, convex outside. The inside is smooth, polished. The outside is rougher, sometimes with graceful ribs or concentric ridges or combinations of both. Univalves are conical and spiraling, with a series of ...
— Let's collect rocks & shells • Shell Oil Company

... the grinding-teeth of Plagiolophus are similar to those of Anchitherium, and their crowns are as thinly covered with cement; but the grinders diminish in size forwards, and the last lower molar has a large hind lobe, convex outwards and concave inwards, as in Palceotherium. The ulna is complete and much larger than in any of the Equidae, while it is more slender than in most of the true Palaeotheria; it is fixedly united, but not ankylosed, with the radius. There are ...
— Critiques and Addresses • Thomas Henry Huxley

... Attainment in the Flesh"; "The Great Red Dragon, by Lord Chester"; "The Coming of the Shepherd from Joseph, The Standing of the Great Ensign, by Koresh." The "Religio-science" of this Chicago revelator is based, first upon some precise measurements of the earth which prove that its surface is concave; and second upon some philological discoveries very much resembling puns. Thus the "cross of Christ" is explained in a sense of the word more common among horse-breeders than ...
— The Profits of Religion, Fifth Edition • Upton Sinclair

... of their ground-plan formed a parallelogram, whose enclosure wall was often divided into vertical panels easily distinguished by the different arrangements of the building material. At El-Kab and other places the courses of crude brick are slightly concave, somewhat resembling a wide inverted arch whose outer curve rests on the ground. In other places there was a regular alternation of lengths of curved courses, with those in which the courses were strictly horizontal. The object of this method of structure ...
— History Of Egypt, Chaldaea, Syria, Babylonia, and Assyria, Volume 2 (of 12) • G. Maspero

... high king of Cadmus' folk, I stand here with news certified and sure From Argos' camp, things by myself descried. Seven warriors yonder, doughty chiefs of might, Into the crimsoned concave of a shield Have shed a bull's blood, and, with hands immersed Into the gore of sacrifice, have sworn By Ares, lord of fight, and by thy name, Blood-lapping Terror, Let our oath be heard— Either to raze the walls, make void the hold Of Cadmus—strive his children as they ...
— Suppliant Maidens and Other Plays • AEschylus

... flutes, channelled out in such a way that if a carpenter's square be placed in the hollow of a flute and turned, the arm will touch the corners of the fillets on the right and left, and the tip of the square may keep touching some point in the concave surface as it moves through it. The breadth of the flutes is to be equivalent to the enlargement in the middle of a column, which will be ...
— Ten Books on Architecture • Vitruvius

... were made of a branch of the incense cedar (Libocedrus decurrens), or of the California nutmeg (Tumion Californicum [Torreya]), made flat on the outer side, and rounded smooth on the inner or concave side when the bow is strung for use. The flat, outer side was covered with sinew, usually that from the leg of a deer, steeped in hot water until it became soft and glutinous, and then laid evenly and smoothly over ...
— Indians of the Yosemite Valley and Vicinity - Their History, Customs and Traditions • Galen Clark

... world-old young man with the fashionable concave torso, and alarmingly convex bone-rimmed glasses. Through them his darkly luminous gaze glowed upon Terry. To escape their warmth she sent her own gaze past him to encounter the arctic stare of the large blonde person who had been included so lamely ...
— Cheerful—By Request • Edna Ferber

... the theory maintained by Kant, Spinoza, and others. It maintains that both brain and consciousness (or mind and body) are but two different expressions of one underlying reality—just as the convex and concave surfaces of a sphere are but two expressions of an underlying reality. As to the nature of this reality, Kant and Herbert Spencer were content to call it X or the unknown, while Spinoza maintained ...
— The Problems of Psychical Research - Experiments and Theories in the Realm of the Supernormal • Hereward Carrington

... along its peripheral, convex edge to the head of the tibia, the medial meniscus being connected also to the capsular ligament of the joint. The tendon of the popliteus muscle intervenes between the lateral meniscus and the capsule. The central, concave edges of the ...
— Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition. • Alexander Miles

... strength of fiercest giants in my armies; Mine anger's at the highest, and I could shake The firm foundation of the earthly globe; Could I but grasp the poles in these two hands I'd pluck the world asunder. He would scale heaven, and when he had ——got beyond the utmost sphere, Besiege the concave of this universe, And hunger-starve the gods till they confessed What furies did oppress ...
— Curiosities of Literature, Vol. II (of 3) - Edited, With Memoir And Notes, By His Son, The Earl Of Beaconsfield • Isaac D'Israeli

... longer in the hall. He was marching along a gallery overhanging one of the great streets of the moving platforms that traversed the city. Before him and behind him tramped his guards. The whole concave of the moving ways below was a congested mass of people marching, tramping to the left, shouting, waving hands and arms, pouring along a huge vista, shouting as they came into view, shouting as they passed, ...
— When the Sleeper Wakes • Herbert George Wells

... investigating truth, yet, as the mines of science have been diligently opened, and their treasures widely diffused, there may be parts chosen, which, by a proper combination and arrangement, may contribute not only to entertainment but use; like the rays of the sun, collected in a concave mirror, to serve particular purposes of light ...
— The Works of Samuel Johnson in Nine Volumes - Volume V: Miscellaneous Pieces • Samuel Johnson

... groans; where Field shrugs his shoulders, Chopin twists his whole body; where Field puts some seasoning into the food, Chopin empties a handful of cayenne pepper. In short, if one holds Field's charming romances before a distorting, concave mirror, so that every delicate impression becomes a coarse one, one gets Chopin's work. We implore Mr. Chopin to ...
— Chopin: The Man and His Music • James Huneker

... of Napoleon are but a terse restatement of those of Caesar, and the skill of Hannibal at Cannae still holds place as a model for the concave formation of a battle-line, so have all the decisive battles of history taken shape from the timely handling of men, in the exercise of that sound judgment which adapts means to ends, in every work of life. ...
— Bay State Monthly, Vol. I, No. 3, March, 1884 - A Massachusetts Magazine • Various

... the top camber without a set of templates,[18] but a fairly accurate idea of the concave camber can be secured by slowly passing a ...
— The Aeroplane Speaks - Fifth Edition • H. Barber

... now turned more softly gray; the great watch-stars shut up their holy eyes; the east began to kindle. Faint streaks of purple soon blushed along the sky; the whole celestial concave was filled with the inflowing tides of the morning light, which came pouring down from above in one great ocean of radiance; till at length, as we reached the Blue Hills, a flash of purple fire blazed out from above the horizon, and turned the dewy teardrops of ...
— The Literary World Seventh Reader • Various

... she received all the attention and watchful tenderness which she needed continually, by reason of age and manifold infirmities. But while our life has its outer convex side, which magnifies its advantages before the world, it has its inner concave side also, which reduces the outer circumstances of prosperity into littleness, when "the heart knoweth its own bitterness, and a stranger doth not intermeddle with its joy." So it was with Mary Stansfield. She had a refined ...
— Working in the Shade - Lowly Sowing brings Glorious Reaping • Theodore P Wilson

... raised them to his breast, Around the joyful Mercians prest, And made their shouts of triumph rise, To the fair concave of the skies. ...
— Elegies and Other Small Poems • Matilda Betham

... lighted taper before her. In front of all were a number of my younger pupils, the royal children, in circles also. Close by the altar, on a low square stool, overlaid with a thin cushion of silk, sat the high-priest, Chow Khoon Sah. In his hand he held a concave fan, lined with pale green silk, the back richly embroidered, jewelled, and gilt. [Footnote: The fan is used to cover the face. Jewelled fans are marks of distinction among the priesthood.] He was draped in a yellow robe, ...
— The English Governess At The Siamese Court • Anna Harriette Leonowens

... a vast lake of saffron and rose and ethereal green, through which floated the curved shallop of a thin new moon, slowly deepening from lustreless white, through gleaming silver, into burnished gold, and attended by one solitary, pearl-white star. The vast concave of sky above was of violet, infinite and flawless. Far out dusky amethystine islets clustered like gems on the shining breast of the bay. The little pools of water along the low shores glowed like mirrors of polished jacinth. The small, pine-fringed headlands ...
— Lucy Maud Montgomery Short Stories, 1896 to 1901 • Lucy Maud Montgomery

... the depot on the third day. We reached the Lower Glacier Depot three and a half days after. The lower part of the glacier was very badly crevassed. These crevasses we had never seen on the way up, as they had been covered with three to four feet of snow. All the bridges of crevasses were concave and very wide; no doubt their normal summer condition. On Christmas Day we made in to the lateral moraine of the Cloudmaker and collected geological specimens. The march across the Barrier was only remarkable for the extremely bad lights we had. For eight consecutive days we only saw an exceedingly ...
— Scott's Last Expedition Volume I • Captain R. F. Scott

... followed him into the storeroom, but remained near the open doorway in a concave and pessimistic attitude. Penrod felt in a dark corner of the box and laid hands upon a simple apparatus consisting of an old bushel-basket with a few yards of clothes-line tied to each of its handles. He passed the ends of the lines over a big spool, which revolved upon an axle of wire suspended ...
— Penrod • Booth Tarkington

... Phoebus Apollo, known as the "far-darter;" or shall I say some fierce Maenad with electric snakes having nickel-plated skins; or shall I say some terrific modern war-god, pouring poison gases from a forest of chemical tubes? Over the top of the flesh-mountain was a big metal object, a shining concave dome with which all the tubes connected; so that a stranger to the procedure could not have felt sure whether the mountain was holding up the dome, or was dangling from it. A piece of symbolism done by a maniac artist, whose ...
— They Call Me Carpenter • Upton Sinclair

... isolated from friendly human influences as Sergeant Moore was, his mind and his emotions are apt to take queer twists and turns, his judgment to become strangely warped, his vision and sense of proportion to assume the highly misleading characteristics of convex and concave mirrors, which ...
— Jan - A Dog and a Romance • A. J. Dawson

... hands, he pushed it against this point, turning and twisting it as he ripped off the thick and fibrous husk. Then he cracked each nut in half with a well-directed blow of a heavy knife. For the best copra-making, the half-nuts should be placed in the sun, concave side up. As the meats begin to dry, they shrink away from the shell and are readily removed, being then copra, the foundation of the many toilet preparations, soaps and creams, that are ...
— White Shadows in the South Seas • Frederick O'Brien

... savannahs—Earth has not a plain So boundless or so beautiful as thine; The eagle's vision cannot take it in. The lightning's wing, too weak to sweep its space, Sinks half way o'er it like a wearied bird;— It is the mirror of the stars, where all Their host within the concave firmament, Gay marching to the music of the spheres, Can see themselves ...
— The Mirror of Literature, Amusement, and Instruction, Vol. 17, - Issue 493, June 11, 1831 • Various

... resemblance. The house, the rooms, are almost absolutely the same; there may be changes of detail, but they don't modify the general effect. There are the same precious pictures on the walls of the salon—the same great dusky fresco in the concave ceiling. The daughter is not rich, I suppose, any more than the mother. The furniture is worn and faded, and I was admitted by a solitary servant, who carried a twinkling taper before me up the great ...
— The Diary of a Man of Fifty • Henry James

... when the Ruler of the genial day, Behind some darkening planet forms his way, Desponding mortals, with officious care, The concave drum, and magic brass prepare; Implore him to sustain the important fight, And save depending worlds from endless night. Fondly they hope their labour may avail, To ease his conflict, and assist his toil. Whilst he in ...
— The Tatler, Volume 1, 1899 • George A. Aitken

... qualities noted. Both men and women were all over the place, and much vigorous dancing was going on. Using the same gansa as the Ifugao, the Igorot beats it on the convex side with a regular padded drumstick, whereas the Ifugao uses any casual stick on the concave side. Moreover, the Bontok dancers went around their circle, beating their gansas the while, in a sort of lope, the step being vigorous, long, easy, and high; as in all the other dances seen, the motion was against the sun. The gansa beat seemed to be at uniform ...
— The Head Hunters of Northern Luzon From Ifugao to Kalinga • Cornelis De Witt Willcox

... knocking at the poor ship's side like sledge hammers; and the lightnings fell around us scorchingly, with forked bolts, as arrows from the hand of a giant; the thunders overhead, close overhead, crashing from a concave cloud that hung about us heavily—a dense, black, suffocating curtain—roared and raved as nothing earthly can, but thunder in the tropics; the rain was as a cataract, literally rushing in a mass: the winds appeared not winds, nor whirlwinds, ...
— The Complete Prose Works of Martin Farquhar Tupper • Martin Farquhar Tupper

... quit wearing the magnetized shoes, afraid the vibration of them would weaken the bubble still more. And he began noticing sections where the bubble did not seem to be perfectly concave, as though the rolling mill had pressed the metal too thin in places and it was swelling ...
— The Nothing Equation • Tom Godwin

... far as he could see, in front and to left and right, their bayonets flashed in the sun, and a cry of admiration sprang to his lips. Forward they came, their line even and beautiful, and then the tempest beat upon them. The entire French fire was concentrated upon the concave red lines. The batteries poured grape shot upon them and a sleet of lead cut through flesh and bone. Gaps were torn in their ranks, but the others closed up, and came on, the American Colonials on their ...
— The Lords of the Wild - A Story of the Old New York Border • Joseph A. Altsheler

... experiments, and, in twenty years he had expended no less than L2,000: but not without mighty results; for he ascertained the true length of the solar year, made many useful discoveries in chemistry and medicine, and anticipated many of the modern uses of glass, learning the powers of convex and concave lenses for the telescope, microscope, ...
— Cameos from English History, from Rollo to Edward II • Charlotte Mary Yonge

... it into his head to go up a third time. He wished to attempt a descent in a parachute of his own construction, which he believed was vastly superior to the ordinary one. He altered the form altogether, though that form had been proved to be satisfactory. In place of a concave surface, supporting itself on a volume of air, Cocking used an inverted cone, of an elaborate construction, which, instead of supporting him in the air, only accelerated his fall. Unhappily, Green participated in this experiment. The two made an ascent from Vauxhall, on ...
— Wonderful Balloon Ascents - or, the Conquest of the Skies • Fulgence Marion

... Petitions of bakers against millers; and at length, in the month of April—troops of ragged Lackalls, and fierce cries of starvation! These are the thrice-famed Brigands: an actual existing quotity of persons: who, long reflected and reverberated through so many millions of heads, as in concave multiplying mirrors, become a whole Brigand World; and, like a kind of Supernatural Machinery wondrously move the Epos of the Revolution. The Brigands are here: the Brigands are there; the Brigands are coming! Not otherwise sounded ...
— The French Revolution • Thomas Carlyle

... approximately the same, and breadth of nasals, length of incisive foramina and length of molariform tooth-rows, which measure more; nasals relatively (48 per cent of length of nasals) as well as actually broader anteriorly; anterior border of zygomatic plate more concave; auditory bullae smaller; infraorbital foramina larger when viewed anterolaterally. S. c. relictus closely resembles S. c. paludis in ...
— A New Bog Lemming (Genus Synaptomys) From Nebraska • J. Knox Jones

... go to Sevenbergen, the dwarf nudged Gerard with his bundle of parchments and held out a concave claw. ...
— The Cloister and the Hearth • Charles Reade

... L. grandiflorum, the almost parallel or slightly diverging anthers and stigmas project a little above the tube of the somewhat concave flower; and they stand directly over the open space leading to the drops of nectar. Consequently when insects visit the flowers of either form (for the stamens in this species occupy the same position in both forms), they will get their foreheads or proboscides ...
— The Different Forms of Flowers on Plants of the Same Species • Charles Darwin

... entirely of light metal, and fold when not in use, so that only the frames are visible. Sometimes these also fold and are housed, or wholly disappear within the mast. Steam-boilers are also placed at the foci of huge concave mirrors, often a hundred feet in diameter, the required heat being supplied by the sun, without smoke, instead of by bulky and dirty coal. This discovery gave commercial value to Sahara and other tropical deserts, which are now desirable for mill-sites and for generating power, on account ...
— A Journey in Other Worlds - A Romance of the Future • John Jacob Astor

... solitude as we should do if cast on a rock in the middle of the ocean, and all the Londoners tell us there is between them and us a great, impassable gulf of mud. There are two roads through the Park, but the new one is so convex and the old one so concave, that by this extreme of faults they agree in the common one of ...
— A History of English Prose Fiction • Bayard Tuckerman

... are the municipal police," explained the king, resting his hand on the gold frame of the glass; "they are watching the city." And when the strangers drew nearer they were surprised to see reflected, in the deeply concave glass, the entire city in miniature; its streets, parks, public buildings, and moving populace. And what seemed to be the most remarkable feature of the invention was, that the instant the eye rested on any particular portion of the whole that part was ...
— The Land of the Changing Sun • William N. Harben

... electricities, as when connected with the opposite poles of an insulated galvanic cell, the needle is repelled by one pair and attracted by the other, and therefore rotates through an arc of greater or less extent. A small concave mirror is attached above the needle and its image is reflected on a graduated screen. This makes the smallest movement visible. Sometimes the quadrants are double, forming almost a complete box, within ...
— The Standard Electrical Dictionary - A Popular Dictionary of Words and Terms Used in the Practice - of Electrical Engineering • T. O'Conor Slone

... part bulges south towards the river bank between Wagon Drift and the loop near Potgieter's Drift; its other limb is broken into irregular heights, Brakfontein kopje apparently marking its south-eastern apex. On the concave north-eastern side Spion Kop is about at the centre, and is four miles north of Wagon Drift. The plateau is three or four hundred feet above the river and Spion Kop about the same height above the plateau. Near the northern apex rises the Blaauwbank River, which flows eastward ...
— Lessons of the War • Spenser Wilkinson

... you do not consider the laws of acoustics: a whisper becomes a peal of thunder in the focus of reverberation. Allow me to explain this: sounds striking on concave surfaces are reflected from them, and, after reflection, converge to points which are the foci of these surfaces. It follows, therefore, that the ear may be so placed in one, as that it shall hear a sound ...
— Nightmare Abbey • Thomas Love Peacock

... And by mirrors it is made perspicuous that, when the sun is eclipsed, the moon is in a direct line below it. Anaximander, that the sun is eclipsed when the fiery mouth of it is stopped and hindered from respiration. Heraclitus, that it is after the manner of the turning of a boat, when the concave seems uppermost to our sight, and the convex nethermost. Xenophanes, that the sun is eclipsed when it is extinguished; and that a new sun is created and rises in the east. He gives a farther account of an eclipse of the sun which remained ...
— Essays and Miscellanies - The Complete Works Volume 3 • Plutarch

... description. My own face is a narrow one, and yet I find that I cannot get my eyes into the centre, nor near the centre, of these glasses. Therefore, the lady's eyes are set very near to the sides of the nose. You will perceive, Watson, that the glasses are concave and of unusual strength. A lady whose vision has been so extremely contracted all her life is sure to have the physical characteristics of such vision, which are seen in the forehead, ...
— The Return of Sherlock Holmes • Arthur Conan Doyle

... the little girl's mother and the big brothers stood on the edge of the timothy and viewed the concave stretch that should have showed green and waving from its rim to the boggy center, they planned the destruction of the rodents, and declared that if any escaped death by poison, the little girl should snare them and receive a cent ...
— The Biography of a Prairie Girl • Eleanor Gates

... of superstition that enveloped his powerful mind, though it may have dimmed, could not obscure the brightness of his genius. To him, and apparently to him only, among all the inquiring spirits of the time, were known the properties of the concave and convex lens. He also invented the magic-lantern; that pretty plaything of modern days, which acquired for him a reputation that embittered his life. In a history of alchymy, the name of this great man cannot ...
— Memoirs of Extraordinary Popular Delusions - Vol. I • Charles Mackay

... it—a small but surprisingly luxurious vessel. The foliage from above it was cut away by ready workmen; and in half an hour more we were rising from the forest. Straight up, into that cloudless sky. The land dropped away beneath us; visually concave at first as the circular horizon seemed to rise with us. The sky overhead fortunately was empty—nothing in sight to bar our outward flight. And we ...
— Tarrano the Conqueror • Raymond King Cummings

... through which the Mississippi runs easily yields to the action of the fierce current. The land worn away at one point is often deposited, in the form of a bar or tongue of land, in the concave of the next bend. The area thus added becomes the property of whoever owns the river front. Many a man has seen his plantation steadily falling into the Mississippi, year by year, while a plantation, a dozen miles below, would annually find its area increased. Real estate ...
— Camp-Fire and Cotton-Field • Thomas W. Knox

... rake on his shoulder, and we were close on him before he knew; for the car was coasting, and ran with hardly any noise save the whir of the chains. For a flashing instant that old face shone out of the circle of our lights, concave with astonishment; ...
— The Princess Passes • Alice Muriel Williamson and Charles Norris Williamson

... but a very common species, highly colored and very attractive. The pileus and the stem are bright red and often vermilion. The pileus is at first convex, but, when fully expanded, it is nearly or quite flat, and in wet weather it is even concave by the elevation of the margin, smooth or minutely scaly, often umbilicate. Its color varies from a bright red or vermilion or ...
— The Mushroom, Edible and Otherwise - Its Habitat and its Time of Growth • M. E. Hard

... nearly met above the short, tip-tilted nose, freckled as a plover's egg, and that at a time when no well brought-up damsel ventured forth in the sun's rays without veil or parasol. Her face was deficient in modelling, being one of those subtly concave faces not without a fascination of their own, with an egg-like curve of prominent delicately-square chin. Her mouth, too large, opened very beautifully when she laughed over square thickly-white teeth. Her eyes were ...
— Secret Bread • F. Tennyson Jesse

... had not been for the strong, firm hold on my arm, I could not have stood it. As it was I dared not think. Suddenly we turned a sharp angle and found ourselves in a curious semicircular place, almost level and fifty or sixty feet deep in the concave, as if a great piece had been gouged out of the mountain by the glacier which must once have ...
— Elsket - 1891 • Thomas Nelson Page

... each word with a slight jerk of his head, he stared at Lingard, his right eye open and big, the left small and nearly closed by the swelling of one half of his face, that appeared all drawn out on one side like faces seen in a concave glass. And they stood exactly opposite each other: one tall, slight and disfigured; the other tall, ...
— An Outcast of the Islands • Joseph Conrad

... body of this hemisphere was hell, shared as a vast cone, of which the apex was the centre of the globe; and here, according to Dante, was the seat of Lucifer. The concave of Hell had been formed by his fall, when a portion of the solid earth, through fear of him, ran back to the southern uninhabited hemisphere, and formed there, directly antipodal to Jerusalem, ...
— The Divine Comedy, Volume 1, Hell [The Inferno] • Dante Alighieri

... font, in the old position, was presented by Mrs. Barrow in memory of her husband, and designed by Mr. G.F. Bodley. It is made of Verde di Prato marble, octagonal in shape, and rests upon a circular base surrounded by detached pillars, all of the same material. The faces of the octagon are concave, and without decoration, except that towards the east, which displays a star ...
— Bell's Cathedrals: Southwark Cathedral • George Worley

... a vast projecting rock, from which you look down a precipice absolutely perpendicular, and many hundred feet deep, upon the torrent at the bottom, which finds its noisy way over large fragments of rock. The point of view is a great projection of the mountain on this side, answered by a concave of the opposite, so that you command the glen both to the right and left. It exhibits on both immense sheets of forest, which have a most magnificent appearance. Beyond the wood to the right, are some inclosures hanging on the side of a hill, ...
— A Tour in Ireland - 1776-1779 • Arthur Young

... wings, and constitute the commercial article. They are generally killed by immersion in boiling water, which causes them to swell to twice their natural size, and are then dried and packed for market. The insects shrivel in drying, and assume the form of irregular grains, fluted and concave. The best sorts have a silvery-grey colour, with a purplish reflection, and seem to be dusted with a white powder. This appearance is often given by means of heavy spar, carbonate of lead, Venice talc, &c. A good ...
— Field's Chromatography - or Treatise on Colours and Pigments as Used by Artists • George Field

... in a burette form what is called a meniscus at their upper surfaces. In the case of liquids such as water or aqueous solutions this meniscus is concave, and when the liquids are transparent accurate readings are best obtained by observing the position on the graduated scales of the lowest point of the meniscus. This can best be done as follows: Wrap around the burette a piece of colored paper, ...
— An Introductory Course of Quantitative Chemical Analysis - With Explanatory Notes • Henry P. Talbot

... Aristotle, as, for example, his explanation of the power of the lever to make a small weight raise a larger one. This is due, according to Aristotle, to the generally miraculous character of the circle and of all circular movement. The circle is both convex and concave; it is made by a fixed point and a moving line, which contradict each other; and whatever moves in a circle moves in opposite directions. Nevertheless, movement in a circle is the most "natural" movement; and ...
— The Varieties of Religious Experience • William James

... comprehensible by discarding the irrelevant, and attracting attention to the essential; it must also render us the service of bringing to a focus that phase of life it represents. The mirror which the dramatist holds up to nature should be a concave mirror, which concentrates the rays impinging on it to a luminous focal image. Hamlet was too much a metaphysician to busy his mind about the simpler science of physics; but surely this figure of the concave mirror, with its phenomenon of concentration, ...
— The Theory of the Theatre • Clayton Hamilton

... Comparison) in divers places of the Surface of the Earth, there are not only Neighbouring Hills, Trees, &c. that are rais'd above the Horizontal Level of the Valley, but Rivers, Wells, Pits and other Cavities that are depress'd beneath it, and that such Protuberant and Concave parts of a Surface may remit the Light so differingly, as much to vary a Colour, some examples and other things, that we shall hereafter have occasion to take notice off in this Tract, will sufficiently declare, till when, it may suffice to put you in mind, that of two Flat-sides of the same ...
— Experiments and Considerations Touching Colours (1664) • Robert Boyle

... of limestone from neighboring mountains. The blocks are small and badly cut, the stone courses being concave, to offer a better resistance to downward thrust and to shocks of earthquake. When breaches in the masonry are examined, it can be seen that the external surface of the steps has, as it were, a double stone facing, each facing being carefully dressed. The body of the pyramid ...
— The Great Events by Famous Historians, Vol. 1 • Various

... rule the stripes of a Royal Bengal are single and dark. The skull is widely different from that of his brother the Hill tiger, being low in the crown, wider in the jaws, rather flat in comparison, and the brain-pan longer with a sloping curve at the end, the crest of the brain-pan being a concave curve. ...
— Sport and Work on the Nepaul Frontier - Twelve Years Sporting Reminiscences of an Indigo Planter • James Inglis

... concave of the luminous air, Large, loving, and languid, the stars here and there, Like the eyes of shy passionate women, look'd down O'er the dim world whose sole tender light was their own, When Matilda, alone, from her chamber ...
— Lucile • Owen Meredith

... revelation presents to us a perfectly different aspect of the universe from that presented by the sciences. The two informations are like the distinct subjects represented by the lines of the same drawing, which, accordingly as they are read {269} on their concave or convex side, exhibit to us now a group of trees with branches and leaves, and now human faces." ... "While then reason and revelation are consistent in fact, they often are inconsistent in appearance; and this seeming discordance ...
— On the Genesis of Species • St. George Mivart

... than three weeks. The trick put upon him may be shortly described by the fact that the female choristers were placed in an adjoining room, and that he only fired at their reflection thrown forward into that in which he slept by the effect of a concave mirror. ...
— Letters On Demonology And Witchcraft • Sir Walter Scott

... Long Vacation I had one private pupil, Crawford, the only pupil this year, and the last that I ever had. At this time there is on my papers an infinity of optical investigations: also a plan of an eye-piece with a concave lens to destroy certain aberrations. On Aug. 20th I went to Woodford to see Messrs Gilbert's optical works. From Aug. 13th I had been preparing for the discussion of the Greenwich Solar Errors, and I had a man at work in my rooms, ...
— Autobiography of Sir George Biddell Airy • George Biddell Airy

... upper angle of the terrace has been washed away and deposited in the lower angle, and the result is the beginning of a good series of curves. Figure 59 shows an ideal slope, with its double curve, comprising a convex curve on the top of the bank, and a concave curve at the lower part. This is a slope that would ordinarily be terraced, but in its present condition it is a part of the landscape picture. It may be mown as readily as any other part of the lawn, and it ...
— Manual of Gardening (Second Edition) • L. H. Bailey

... thought he could discern an irregular pink crescent, with the concave side downwards, somewhere in the blackness beyond the bows. He rubbed his eyes, and said nothing, believing that the unaccustomed strain of gazing into the dark had affected his sight. But the pink crescent brightened and deepened, and speedily it was joined by two others, ...
— The Captain of the Kansas • Louis Tracy

... of Lubaczow the Russian line drew back about twenty miles. For the defense of Lemberg the front ran in a concave form from along the River Tanev, five miles from Rawa-Ruska, down to Grodek and Kolodruby; then eastward behind the Dniester to Zuravno and Halicz. The marshes of the Dniester, then swollen by heavy rains, formed a good natural defense; the intrenchments ...
— The Story of the Great War, Volume V (of 12) - Neuve Chapelle, Battle of Ypres, Przemysl, Mazurian Lakes • Francis J. Reynolds, Allen L. Churchill, and Francis Trevelyan

... way changing the original focus. If, however, the supposed plane surface proves to be convex, the image will not be sharply defined in the telescope until the eyepiece is moved away from the object glass; while if the converse is the case, and the supposed plane is concave, the eyepiece must now be moved toward the objective in order to obtain a sharp image, and the amount of convexity or concavity may be known by the change in the focal plane. If the surface has ...
— Scientific American Supplement, No. 484, April 11, 1885 • Various

... sphere in the middle of a large hollow sphere, leaving a space of something more than half an inch between them. The interior sphere was insulated, the external one uninsulated. To the former he communicated a definite charge of electricity. It acted by induction upon the concave surface of the latter, and he examined how this act of induction was effected by placing insulators of various kinds between the two spheres. He tried gases, liquids, and solids, but the solids alone gave him positive results. He constructed two instruments of the foregoing ...
— Faraday As A Discoverer • John Tyndall

... on the pith Of sugar'd rush, and eats the sagg And well-bestrutted bee's sweet bag: Gladding his palate with some store Of emmets' eggs; what would he more? But beards of mice, a newt's stewed thigh, A bloated earwig and a fly; With the red-capp'd worm that's shut Within the concave of a nut, Brown as his tooth. A little moth Late fatten'd in a piece of cloth: With withered cherries, mandrakes' ears, Moles' eyes; to these the slain stag's tears The unctuous dewlaps of a snail, The broke-heart of a nightingale O'ercome in music; with a wine Ne'er ravish'd from ...
— The Hesperides & Noble Numbers: Vol. 1 and 2 • Robert Herrick

... the Earth's crescent, compared to the Lunar, was of dimensions much greater, being fully 4 times larger. You would have called it a vast, beautiful, but very thin bow extending over the sky. A few points, brighter than the rest, particularly in its concave part, revealed the presence of lofty mountains, probably the Himalayahs. But they disappeared every now and then under thick vapory spots, which are never seen on the Lunar disc. They were the thin concentric cloud rings that ...
— All Around the Moon • Jules Verne

... cut the soap into sections having concave ends, and in stamping, the corners are forced into the concavity, with the result that unsightly markings are produced at each end of the tablet. It is preferable to have a cutter with convex ends, and if the stamping is to be done ...
— The Handbook of Soap Manufacture • W. H. Simmons

... figures, should be studied. The whole of the exterior of the skull in all its parts has been altered; the hinder surface, instead of sloping backwards, is directed forwards, entailing many changes in other parts; the front of the head is deeply concave; the orbits have a different shape; the auditory meatus has a different direction and shape; the incisors of the upper and lower jaws do not touch each other, and they stand in both jaws above the plane of the molars; the canines of the upper jaw stand in front of those of the ...
— The Variation of Animals and Plants Under Domestication, Vol. I. • Charles Darwin

... his breakfast. The end of his spare time had now arrived, and emerging from the garden by getting over the hedge at the back he pursued a path northward, till he came to a wide and lonely depression in the general level of the upland, which was sown as a corn-field. This vast concave was the scene of his labours for Mr Troutham the farmer, and he descended ...
— Jude the Obscure • Thomas Hardy

... combination with a mold wheel having a series of cogs interposed by a series of concave stops, blanks or abutments upon its periphery, a drive wheel having cogs and a blank surface on its perimeter so that the mold wheel may be moved, stopped and locked by said drive wheel which has a continuous movement, substantially as and ...
— Scientific American, Vol. 17, No. 26 December 28, 1867 • Various

... nut shown in Fig. 2 has but a single transverse slot, and the nut is made concave on the under surface, so that when the nut is screwed home it will contract the outer portion ...
— Scientific American, Volume XLIII., No. 25, December 18, 1880 • Various

... Performs not well in those substantial things, Whose mass adhesive to the metal clings; Where the strong labial muscles must embrace The gentle curve, and sweep the hollow space. With ease to enter and discharge the freight, A bowl less concave, but still more dilate, Becomes the pudding best. The shape, the size, A secret rests, unknown to vulgar eyes. Experienced feeders can alone impart A rule so much above the lore of art. These tuneful lips that thousand spoons have tried, ...
— Library Of The World's Best Literature, Ancient And Modern, Vol 4 • Charles Dudley Warner

... on the globe, had 4 iron supporters, and was a table about 20 inches in diameter, and 6 in thickness! The edge was cut into 12 concave superficies like so many half-cylinders; on each of which was a dial showing the hour by the shade of a fleur-de-lis fixed at the top of each half-cylinder. From the top of this table issued 4 iron branches, with glass bowls, like those ...
— The Mirror of Literature, Amusement, and Instruction, Vol. 14, - Issue 400, November 21, 1829 • Various

... the contrary, is open at its upper extremity. The rays from the object observed penetrate freely into it, and strike a concave metallic mirror—that is to say, they are focussed. From thence their reflected rays meet with a little mirror, which sends them back to the ocular in such a way as ...
— The Moon-Voyage • Jules Verne

... who perform the vocal parts, the first is a fellow, in a tone that would rend hell's concave, bawling, "Dust, ho! dust, ho! dust!" Next to him, an amphibious animal, who nightly pillows his head on the sedgy bosom of old Thames, in a voice that emulates the rush of many waters, or the roaring of a cataract, is bellowing "Flounda,a,a,ars!" A daughter of May-day, who dispenses what in ...
— The Works of William Hogarth: In a Series of Engravings - With Descriptions, and a Comment on Their Moral Tendency • John Trusler

... fire and flame, which without doubt contain bodies in rapid motion, for they dissolve and melt numberless other bodies. Or, if one considers its effects, one sees that light collected, for instance, by a concave mirror has the power to heat like fire, i.e. to separate the parts of the bodies; this assuredly points to movement, at least in true philosophy in which one traces all natural activity to mechanical causes. In ...
— Man or Matter • Ernst Lehrs

... was next displayed; Tremendous Gorgon frowned upon its field, And circling terrors filled the expressive shield. Within its concave hung a silver thong, On which a mimic serpent creeps along, His azure length in easy waves extends, Till, in three heads, th' embroidered monster ends." See Pope's "Homer's Iliad," book xi., 1. 43. Lucian here means to ridicule, ...
— Trips to the Moon • Lucian

... (MASSON'S PINE.) Leaves in twos, 4 to 6 in. long, rather stiff, concave on one side and convex on the other, twisted but not curved; sharp-pointed, of a fresh, bright green color. Cones 1 to 11/2 in. long, conical, incurved, solitary but numerous, with closely overlapping scales terminating in slender prickles. An upright, compact tree, 40 to 50 ft. ...
— Trees of the Northern United States - Their Study, Description and Determination • Austin C. Apgar

... the conclusion that he had dropped into a sewer. To get out the way he had entered appeared impossible. He could not leap upward from the slimy, concave bottom the distance he had dropped. To follow the sewer upward would lead him nowhere nearer escape. There remained no hope but to follow the trickling stream downward toward the river, into which his judgment told him the entire sewer system of ...
— The Mad King • Edgar Rice Burroughs

... whole: tripods burning spirits of wine stand round this kind of dead man's throne, and as we saw it (by peering over the heads of our neighbors in the front rank), it looked, in the midst of the black concave, and under the effect of half a thousand flashing cross-lights, properly grand and tall. The effect of the whole chapel, however (to speak the jargon of the painting-room), was spoiled by being CUT UP: there were too many objects for the eye to rest upon: the ten thousand wax-candles, for ...
— The Second Funeral of Napoleon • William Makepeace Thackeray (AKA "Michael Angelo Titmarch")

... and a full understanding of his condition. His hair, somewhat dry, had fallen upon his forehead. His fine, smooth skin was darkened by the exposure of his daily wanderings. His cheek-bones, a trifle high, asserted their place above the softly concave cheeks. His mouth was closed and the lips were slightly compressed; the chin small, gracefully turned, not weak,—not strong. His eyes were abstracted, deep, pensive. His dress told much. The fine plaits of his shirt had sprung apart and been neatly sewed together ...
— Dr. Sevier • George W. Cable

... encircled the soldier's wrist and having thus formed a cushion to receive the pressure and protect the raw flesh, he closed his switch again and gently subjected the manacle to the revolving wheel, holding it upon the edge of the concave ...
— Tom Slade Motorcycle Dispatch Bearer • Percy Keese Fitzhugh

... "yet I have found the comfortable, convex and concave characters often really more difficult in the long run. You must have some hard and durable rock on which to found understanding and security. The soft, crumbling people may be lovable; but they are useless as sand at a crisis. ...
— The Spinners • Eden Phillpotts

... discovery in these regions, one unbroken, or nearly unbroken, sheet of ice continues to extend. In the first few degrees of this its progress, its surface is very sensibly flattened, farther on depressed into a plane, and finally, becoming not a little concave, it terminates, at the Pole itself, in a circular centre, sharply defined, whose apparent diameter subtended at the balloon an angle of about sixty-five seconds, and whose dusky hue, varying in intensity, was, at all times, darker than any other ...
— The Works of Edgar Allan Poe - Volume 1 (of 5) of the Raven Edition • Edgar Allan Poe

... observe what he takes to be a single cloud; while a second spectator, on lower ground, will perceive that there are two clouds. The motions of clouds are so deceptive, that they often seem to be moving in a curve over the great concave of heaven, while they are in fact advancing in nearly a right line. Suppose, for example that a cloud is moving from the distant horizon towards the place where we stand, in a uniform horizontal line without changing either in size or form. Such a cloud, ...
— The Rain Cloud - or, An Account of the Nature, Properties, Dangers and Uses of Rain • Anonymous

... occasions for cords or strings, that men were not long in observing their various sounds, which might give rise to stringed instruments. Those of concussion, as drums and cymbals, might result from the observation of the naturally hollow noise made by concave bodies when struck. ...
— A Catechism of Familiar Things; Their History, and the Events Which Led to Their Discovery • Benziger Brothers

... monstrosities but only as the most natural of artificialities; for they are a part of a horticultural whole. To walk into a Japanese garden is like wandering of a sudden into one of those strange worlds we see reflected in the polished surface of a concave mirror, where all but the observer himself is transformed into a fantastic miniature of the reality. In that quaint fairyland diminutive rivers flow gracefully under tiny trees, past mole-hill mountains, till they fall ...
— The Soul of the Far East • Percival Lowell

... may know it is D, they will say, Because it is made of a perpendicular line and has a curved line behind. Further information may then be given. Turn the D letter up thus , and say, I want to teach you the difference between concave and convex: the under part of the curve is concave and the upper part of it is convex. Then say, I shall now take the letter away, and wish you to shew me concave and convex on one of your fingers; when they ...
— The Infant System - For Developing the Intellectual and Moral Powers of all Children, - from One to Seven years of Age • Samuel Wilderspin

... below the fort some distance was the agency, and beyond it a stockade, inside which in those days dwelt the settlers. All this was strung out on one side of the White River, outside of the curve; and at a point near the agency a foot-bridge of two cottonwood trunks crossed to the concave of the river's bend—a bottom of some extent, filled with growing cottonwoods, and the tepees of many Sioux families. Along the river and on the ...
— The Jimmyjohn Boss and Other Stories • Owen Wister

... work, add (if necessary) fresh coke, and mix well; make hollows, and into these put old crucibles; pack around with coke, so that the surface shall be concave, sloping upwards from the mouths of the crucibles to the sides of the furnace; close the furnace, and, when uniformly heated, substitute for the empty crucibles those which contain the assays. It is rarely advisable to have a very hot fire at first, ...
— A Textbook of Assaying: For the Use of Those Connected with Mines. • Cornelius Beringer and John Jacob Beringer

... illustration of the daring of speculation than in the case of Lewes's theory of the relations of the subjective and objective. He interprets matter and mind, motion and feeling, objective and subjective, as simply the outer and inner, the concave and convex, sides of one and the same reality. Mind is the same as matter, except that it is viewed from a different aspect. In this opinion he resembles Schelling more than any other thinker, as he does in some other of his speculations. As a monist, his conclusions are similar to those of the leading ...
— George Eliot; A Critical Study of Her Life, Writings & Philosophy • George Willis Cooke

... elsewhere, sometimes in the form of Mexican onyx, which is only a translucent variety of the same marble. In its reproduction here the marble has been imitated even to the natural imperfections which roughened the Italian stone. In the concave surfaces of the ornamentation the color has been deepened, so that it appears sometimes as a rich reddish brown. All this enhances the antique effect, making the palace walls and columns still more like those of ...
— The Jewel City • Ben Macomber

... a minute morsel of protoplasm, which lives in a concave-convex, brown, finely reticulated shell, through a circular opening in the concave side of which it can project itself by throwing out pseudopodia. If we look through the microscope at a drop of water ...
— Unconscious Memory • Samuel Butler

... a matter of fact this form of leg is as old as the Romans and is really the same as the animal legs of wood or bronze, used as supports for tripods and tables by Assyrians, Egyptians and Greeks. The cabriole leg may be defined as "a convex curve above a concave one, with the point of junction smoothed away. On Italian console tables and French commodes we see the two simple ...
— The Art of Interior Decoration • Grace Wood

... in diameter and thirty inches long. In the farther end of the tube gleamed a lump of yellow metal, which I took to be gold. Hall and I were seated near another table about twenty-five feet distant from the tube, and on this table was an apparatus furnished with a concave mirror, whose optical axis was directed towards the tube. It occurred to me at once that this apparatus would be suitable for experimenting with electric waves. Wires ran from it to the floor, and in the cellar beneath was audible the beating of an engine. My companion made an adjustment ...
— The Moon Metal • Garrett P. Serviss

... uncorrupted frame, Such as the heavens produce: and round the gold Two brazen rings of work divine were roll'd. The bossy naves of sold silver shone; Braces of gold suspend the moving throne: The car, behind, an arching figure bore; The bending concave form'd an arch before. Silver the beam, the extended yoke was gold, And golden reins the immortal coursers hold. Herself, impatient, to the ready car, The coursers joins, and breathes ...
— The Iliad of Homer • Homer

... floor; some of the latter were but a few feet high from the floor; but the formation is going on constantly, and many centuries hence these stalagmites will extend to the ceiling and become complete columns. The stalagmites were all a little concave, and the cavities were filled with water. The water percolates through the roof, a drop at a time—often the drops several minutes apart—and more or less charged with mineral matter. Evaporation goes on slowly, leaving the mineral ...
— Memoirs of Three Civil War Generals, Complete • U. S. Grant, W. T. Sherman, P. H. Sheridan

... matter which has been removed. Nearly this whole line of coast consists of a series of greater or lesser curves, the horns of which, and likewise certain straight projecting portions, are formed of hard rocks; hence the concave parts are evidently the effect and the measure of the denuding action on the softer strata. At the foot of all the cliffs, the sea shoals very gradually far outwards; and the bottom, for a space of some miles, everywhere consists of gravel. I carefully ...
— South American Geology - also: - Title: Geological Observations On South America • Charles Darwin

... there who wore spectacles, not because he had bad eyes, for they were very bright and good, but because nature had formed the lenses of a more than usually rounded shape, with the consequence that their owner was short-sighted and needed a pair of concave glasses to deal with the rays of light and lengthen the focus of the natural lenses. But, metaphorically and poetically, as somebody once wrote, every boy wore glasses of the couleur-de-rose type—those which make everything that is happily beautiful seem ten times ...
— Glyn Severn's Schooldays • George Manville Fenn

... heaven expand into inconceivable dimensions, the stars would be seen to be scattered along the sky like the sands upon the sea-shore. Each bright particular star would be magnified a thousand times, seeming vastly larger, and yet vastly more distant. The whole concave of heaven then would appear a thousand times larger than it does to our eyes, that is, it would appear a thousand times over more like its real size, though even then, eyes thus grandly gifted would fall immeasurably short of the reality of the universe ...
— A Lecture on Physical Development, and its Relations to Mental and Spiritual Development, delivered before the American Institute of Instruction, at their Twenty-Ninth Annual Meeting, in Norwich, Conn • S.R. Calthrop

... navetas are so named from their resemblance to ships. The construction is similar to that of the talayots. The outer wall has a considerable batter. The famous Nau d'Es Tudons is about 36 feet in length. The facade is slightly concave. A low door (a) gives access through a narrow slab-roofed passage (b) to a long rectangular chamber (c), the method of whose roofing is uncertain. All the naus are built with their facades to the south or south-east, with the exception ...
— Rough Stone Monuments and Their Builders • T. Eric Peet

... may be procured from a plumber or hardware dealer. Split into the base of the cartilage so it may be spread as nearly flat as possible and lay on the lead, drawing around its outline with a nail point. Cut out the lead ears with a pair of metal-shears. Hammer into natural concave shape with a bit of heavy wood rounded into a ball at one end for the purpose. (For details of ear ...
— Taxidermy • Leon Luther Pray

... trumpet's voice, Now high in air the imperial standard waves, Emblazoned rich with gold, and glittering gems; And like a sheet of fire, through the dun gloom Streaming meteorous. The soldiers' shouts, And all the brazen instuments of war, With mutual clamor, and united din, Fill the large concave. While from camp to camp, 390 They catch the varied sounds, floating in air, Round all the wide circumference, tigers fell Shrink at the noise; deep in his gloomy den The lion starts, and morsels yet unchewed Drop from his ...
— The Poetical Works of Addison; Gay's Fables; and Somerville's Chase • Joseph Addison, John Gay, William Sommerville

... is a very late acquisition of the human mind, but we are already sufficiently imbued with it to be almost completely disabled from comprehending the thoughts of our ancestors. "How Finn cosmogonists could have believed the earth and heaven to be made out of a severed egg, the upper concave shell representing heaven, the yolk being earth, and the crystal surrounding fluid the circumambient ocean, is to us incomprehensible; and yet it remains a fact that they did so regard them. How the Scandinavians could have supposed the mountains to be the mouldering bones ...
— Myths and Myth-Makers - Old Tales and Superstitions Interpreted by Comparative Mythology • John Fiske

... refraction. He meditated day and night. At last he himself constructed an instrument,—a leaden organ pipe with two spectacle glasses, both plain on one side, while one of them had its opposite side convex, and the other its second side concave. ...
— Beacon Lights of History, Volume VI • John Lord

... wall three miles in length which should be massive enough to protect the city from any similar attack. Its top, which is five feet thick, is three feet above the highest point reached by the water. The bottom of the wall is sixteen feet thick. This wall, which is built concave toward the gulf, is protected by earth and stone filled in for two hundred feet, thus providing a driveway thirty feet wide with walks on either side, beautified ...
— History of the United States, Volume 6 (of 6) • E. Benjamin Andrews

... space. The blood, pulsed from my heart, sped through uncounted leagues before it reached my extremities; the air drawn into my lungs expanded into seas of limpid ether, and the arch of my skull was broader than the vault of heaven. Within the concave that held my brain, were the fathomless deeps of blue; clouds floated there, and the winds of heaven rolled them together, and there shone the orb of the sun. It was—though I thought not of that at the time—like a revelation of the mystery of omnipresence. It is difficult to ...
— The Lands of the Saracen - Pictures of Palestine, Asia Minor, Sicily, and Spain • Bayard Taylor

... bench of rock. The mouth of it on the other side opened into a mighty amphitheatre with solid rock walls shooting vertically hundreds of feet upward. Vertically, he thought—with the back of his head between his shoulders as he looked up—they were more than vertical—they were actually concave. The Almighty had not only stored riches immeasurable in the hills behind him—He had driven this passage Himself to help puny man to reach them, and yet the wretched road was going toward them like a snail. On the ...
— The Trail of the Lonesome Pine • John Fox, Jr.

... supplies nothing to the mind. The ideas of Christian theology are too simple for eloquence, too sacred for fiction, and too majestick for ornament; to recommend them by tropes and figures, is to magnify, by a concave mirror, the sidereal hemisphere. ...
— Lives of the Poets, Vol. 1 • Samuel Johnson

... nutritive matter to exude from the vessels which permeate the periosteum. Nevertheless, the observations adduced by Mr. Spencer,[730] on the strengthening of the bowed bones of rickety children, along their concave sides, leads to the belief that this ...
— The Variation of Animals and Plants Under Domestication, Volume II (of 2) • Charles Darwin

... archiepiscopal and episcopal rank, placed above the arms of prelates of the Church of England, sometimes borne as a charge, and adopted by the BERKELEYS as their crest. The contour of the mitre has varied considerably at different periods, the early examples being low and concave in their sides, the later lofty and convex. See ...
— The Handbook to English Heraldry • Charles Boutell

... fatal horse, But fate retards the blow, and stopt its force: The spear jumpt back upon the priest, so nigh, It gave new credit to the treachery. Yet to confirm how weak was the attempt 'Gainst what the gods will have, his javelin sent, Resum'd with double fury, thro' his side, And the large concave of the machine try'd: When from within the captive Grecians roar; And the beast trembles with another's fear. Yet to the town the present they convey, Thus a new stragem does Troy betray; While to the taken, she becomes a prey. But other monsters ...
— The Satyricon • Petronius Arbiter

... was short sighted, occupied the imperial box at the Coliseum, and, to look down into the arena, a space covering six acres, the area of the Coliseum, was obliged, as Pliny says, to look through a ring with a gem in it—no doubt a concave glass—to see more clearly the sword play of the gladiators. Again, we read of Mauritius, who stood on the promontory of his island and could sweep over the sea with an optical instrument to watch the ships of the enemy. This ...
— Scientific American Supplement No. 822 - Volume XXXII, Number 822. Issue Date October 3, 1891 • Various

... small branches; each berry supported by a seperate stem, and as many as from 3 to 18 or 20 in a clump. the berry is ovate with one of it's extremities attatched to the peduncle, where it is in a small degre concave like the insertion of the stem of the crab apple. I know not whether this fruit can properly be denominated a berry, it is a pulpy pericarp, the outer coat of which is in a thin smoth, tho firm tough pillecle; the ...
— The Journals of Lewis and Clark • Meriwether Lewis et al

... at dusk, as Miss Seward says she first entered it. The prismatic lantern diffused a light gloomily glaring, assisted by the paler flames of the little lamps on the chimney-piece. Through the open windows was shown a darkling view of the lawn, of the concave shrubbery of tall cypresses, yews, laurels, and lilacs, of the wooded amphitheatre on the opposite hill, and of the gray, barren mountain which forms the background. The evening star had risen above the mountain; and the airy harp rang loudly to the breeze, completing the ...
— The Friendships of Women • William Rounseville Alger

... the sidereal heavens have, not inadequately for the purpose designed, been represented by the concave surface of a sphere, in the centre of which the eye of an observer might be ...
— Sir William Herschel: His Life and Works • Edward Singleton Holden

... hear in distance harps By heavenly seraphs strung, And in the concave of the sky The holy vespers sung! Oh, thou great Source of light and power, We bless ...
— The Modern Scottish Minstrel, Volumes I-VI. - The Songs of Scotland of the Past Half Century • Various

... in the thirteenth century, mentioned magnifying glasses as being useful to old people to make them see better. True spectacles are said to have been fashioned in 1317 by Salvino degli Armati, a Florentine nobleman. At first they were convex; indeed, no mention of concave glasses for shortsighted persons was made until towards the middle of the sixteenth century. From that time onward there were developments, and among the household curios are to be found silver, brass, and tortoiseshell rims, and glasses of ...
— Chats on Household Curios • Fred W. Burgess

... display ad. with wood-cut portrait of a chamber- set occupying the foreground and the clare-obscure worked up with various sizes and styles of black type, possesses far more charm for him than does the deep blue of our Southern sky, whose mighty concave seems to reach to Infinity's uttermost verge; a two-story brick livery stable or laundry is to him far more interesting than the splendors of the Day-god rising from the ocean's blue; an eighty-cent dollar with its lying legend more beautiful in his eyes than even Austin's violet ...
— Volume 1 of Brann The Iconoclast • William Cowper Brann

... greatly aided in this part of the work by the remarkable concave gratings lately constructed by Prof. Rowland, of Baltimore, one of which I have the pleasure of showing you. ...
— Scientific American Supplement, No. 363, December 16, 1882 • Various

... the prow, watching our course; when suddenly I heard the waters break with redoubled fury. We were certainly near the shore—at the same time I cried, "About there!" and a broad lightning filling the concave, shewed us for one moment the level beach a-head, disclosing even the sands, and stunted, ooze-sprinkled beds of reeds, that grew at high water mark. Again it was dark, and we drew in our breath with such ...
— The Last Man • Mary Shelley

... burning boats on the canal to the great Galligo Mills, to files of massive warehouses groaning with tobacco, into the heart of the town, where stores, and vaults, and banks, and factories lined the wide, undulating streets; it filled the gray concave with flame till the stars of the dawn shrank to pale invisibility in the advancing glare, and the crackle of hot roofs and beams, and the crash of walls and timbers, drowned the cries of the frightened and bankrupt, ...
— Campaigns of a Non-Combatant, - and His Romaunt Abroad During the War • George Alfred Townsend

... of this place. His next object was to ascertain the altitude of the sun, at the same solstice, and on the very same day, at Alexandria. This he effected by a very simple contrivance: he employed a concave hemisphere, with a vertical style, equal to the radius of concavity; and by means of this he ascertained that the arch, intercepted between the bottom of the style and the extreme point of its shadow, was 7 deg. 12'. This, of course, indicated the distance of the ...
— Robert Kerr's General History and Collection of Voyages and Travels, Volume 18 • William Stevenson



Words linked to "Concave" :   cotyloidal, urn-shaped, convexo-concave, planoconcave, concave polygon, concave shape, concavo-concave, cupular, bursiform, saclike, concaveness, cuplike, concavo-convex, saucer-shaped, intrusive, biconcave, recessed, bowl-shaped, convex, dish-shaped, pouch-shaped, concavity, concave polyhedron, dished



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