"Lens" Quotes from Famous Books
 ... show us the famous telescope, by help of which, he said he had discovered an ant-hill in the moon. It rested in the crotch of a Bread-fruit tree; and was a prodigiously long and hollow trunk of a Palm; a scale from a sea-kraken its lens. ...
— Mardi: and A Voyage Thither, Vol. II (of 2) • Herman Melville
... and coarser pattern. The skill required in this exquisite work is not only shown by the art itself, but the fineness of the design; for some of the feathers of birds, and other details, are only to be made out with a lens; which means of magnifying was evidently used in Egypt, when this Mosaic glass was manufactured. Indeed, the discovery of a lens of crystal by Mr. Layard, at Nimroud, satisfactorily proves its use at an early period in Assyria; and we may conclude that it was neither a recent discovery there, nor ...
— Museum of Antiquity - A Description of Ancient Life • L. W. Yaggy
... vapour it would have to attract three times that quantity. Since any flame supplied with too little air tends to emit free carbon or soot, it follows that any well-made acetylene burner delivering a gas containing benzene vapour will yield a more or lens smoky flame according to the proportion of benzene in the acetylene. Moreover, at ordinary temperatures benzene is a liquid, for it boils at 81 deg. C., and although, as was explained above in the case of water, it is capable of remaining in the state of vapour far below ...
— Acetylene, The Principles Of Its Generation And Use • F. H. Leeds and W. J. Atkinson Butterfield
... devised by Galileo is called the Refracting Telescope, or "Refractor." As we know it to-day it is the same in principle as his "optick tube," but it is not quite the same in construction. The early object-glass, or large glass at the end, was a single convex lens (see Fig. 8, p. 113, "Galilean"); the modern one is, on the other hand, composed of two lenses fitted together. The attempts to construct large telescopes of the Galilean type met in course of time with a great difficulty. The magnified image of the object ...
— Astronomy of To-day - A Popular Introduction in Non-Technical Language • Cecil G. Dolmage
... of the eye are three in number, namely (1) the aqueous humor, a watery fluid inclosed in a chamber behind the cornea; (2) the crystalline lens and its capsule, a transparent, soft solid of a biconvex form, and placed behind the iris; (3) the vitreous humor, a transparent material with a consistence like thin jelly, and occupying as much of the interior of the eye as is ...
— Special Report on Diseases of Cattle • U.S. Department of Agriculture
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