"Eye-piece" Quotes from Famous Books
 ... with copper, lead, zinc, &c., as well as for tailings rather poor in gold, this leaves a wide field of usefulness. The method is described on page 440, but the description needs supplementing for those who are not 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 ...
— A Textbook of Assaying: For the Use of Those Connected with Mines. • Cornelius Beringer and John Jacob Beringer
... Polton, "and the six-inch objective and the low-power eye-piece. Everything is in the case; and I have put 'special rapid' plates into the dark-slides in case the light should ...
— The Red Thumb Mark • R. Austin Freeman
... equal to the Sun's circumference when presenting the largest disc he ever shows to an observer on Earth. Each inner circle corresponded to a diameter reduced by one second. By means of a vernier or eye-piece, the diameter of the Sun could be read off the discometer, and from his diameter my distance could be accurately calculated. On the further side of the machinery was a chamber for the decomposition of the carbonic acid, through which the air was driven by a fan. This fan itself was worked by ...
— Across the Zodiac • Percy Greg
... in which light is gathered together into a focus by refraction, and that in which the same end is attained by reflection. The image formed is in each case viewed through a magnifying lens, or combination of lenses, called the eye-piece. Not for above a century after the "optic glasses" invented or stumbled upon by the spectacle-maker of Middelburg (1608) had become diffused over Europe, did the reflecting telescope come, even in England, the place of its birth, into general use. Its principle ...
— A Popular History of Astronomy During the Nineteenth Century - Fourth Edition • Agnes M. (Agnes Mary) Clerke
... any rate, will be proof against bad luck," she said, as she undid the case, and drew out a prismatic compass. She adjusted the eye-piece, in which was a slit and a glass prism and lifted the sight-vane, down the centre of which a horsehair stretched perpendicularly to the card of the compass. Putting the instrument to her eye, Rose took the bearing of one of the twin forest-clad heights, and said, "Eighty ...
— The Tale of Timber Town • Alfred Grace
... of shrapnel on the wet ground, the metallic clang of bullets and steel fragments on the gun-shields and mountings. But through all the inferno the gunners worked on, swiftly but methodically. After each shot the layers glared anxiously into the eye-piece of their sights and made minute movements of elevating and traversing wheels, the men at the range-drums examined them carefully and readjusted them exactly, the fuse-setters twisted the rings marking ...
— Between the Lines • Boyd Cable
... reduced to such a size that the moon just fitted into the aperture of the V, while opposite sides of the corona were reflected through the prisms to the place where they came together. In this way both sides of the corona were seen through the eye-piece at the same time. On looking at the eclipse this is what Dr. Hastings saw: The light of the corona was divided into its constituents. Prominent among them was a bright green line, which is designated by the number 1,474; to this line attention was directed. Its presence ...
— Scientific American Supplement, No. 401, September 8, 1883 • Various
... observer might feel at discovering that the object in the boy's hand was nothing less incongruous than a pair of binocular glasses, an exquisitely finished example of the highest art of the optician. One of the eye-piece lenses had been lost or broken, for, as the youth raised the glasses to sweep again the distant sea-line, he covered the left-hand cylinder with a flat, oblong object—a printed book. Its title, indeed, ...
— The Doomsman • Van Tassel Sutphen |
