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Scientific American, Vol. 41, No. 11 (1879) (1879)
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lds. It gives us the means of seeing objects so so, indeed, that a person observing the manipulations of an | land. It comes in pairs of disks, one of flint and one of crown minute that without some visual] aid their existence would optician might conclude that almost any one could make a| glass.… … THE MANUFACTURE OF LENSES, © 1879 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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