Glasses

Definition and stakes

Perry F. Nursey,  Popular Science Monthly (1875)

“ Watch-glasses, which perfectly retain their transparency, have resisted every attempt to break them by crushing between the fingers, or by throwing them about indiscriminately on the bare floor. Glass plates, dishes, colored lantern-glasses, and the like, have been similarly thrown about by the handful, stood upon, and otherwise maltreated, but without the slightest injury accruing to them, except, perhaps, when a solitary specimen which had been imperfectly tempered got in with the rest. ”
Source: Wikisource

Arabella B. Buckley,  Through Magic Glasses and Other Lectures

“ C, D, Magnifying-glass. A, B, Enlarged image of the arrow.
"It is here that our 'magic glasses' come to our assistance, and reveal to us what was before invisible. We learnt just now that we see near things by the lens of our eye becoming more rounded in front; but [Pg 36] there comes a point beyond which the lens cannot bulge any more, so that when a thing is very tiny, and would have to be held very close to the eye for us to see it, the lens can no longer collect the rays to a focus, so we see nothing but a blur.
”
Source: Gutenberg

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