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Books Books 1 - 2 of 2 on CoFophonia melted; and if you will make Convex Spectacles, you must have a hollow....
" CoFophonia melted; and if you will make Convex Spectacles, you must have a hollow iron dish, that is a portion of a great Sphaere, as you will have your Spectacles more or less Convex; and the dish must be perfectly polished. But if we seek for Concave... "
Descartes and the Hyperbolic Quest: Lens Making Machines and Their ... - Page 12
by D. Graham Burnett - 2005 - 152 pages
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Transactions of the American Microscopical Society, Volume 28

Microscopy - 1908
...circles, and they are brought to Venice. Here with a handle of Wood are they glewed on by CoFophonia melted; and if you will make Convex Spectacles, you...have a hollow iron dish, that is a portion of a great Sphaere, as you will have your Spectacles more or less Convex; and the dish must be perfectly polished....
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Transactions of the American Microscopical Society, Volumes 27-29

American Microscopical Society - Microscopy - 1907
...to Venice. Here with a handle of Wood are they glewed on by Colophonia melted; and if you will makf Convex Spectacles, you must have a hollow iron dish, that is a portion of a great Sphaere, as you will have your Spectacles more or less Conv«x; and the dish must be perfectly polished....
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