β Scribed by Louis E. Levy
No coin nor oath required. For personal study only.
A NEW PHOTO-INTAGLIO PROCESS.
BY Louis E. LEVY.
[Read a! g]ze slal~ed Jnee{z)z~ cf l/ze [J~slilzΒ’lc', ]~eld Se~blember 21 z892.] JOS. M. WILSON, President, in the Chair.
MR. LEVY : With the exception, perhaps, of the domain of electricity, there is no other special field wherein the recent advances of science have opened so many avenues of progress and effected such notable changes as in the range of the graphic arts. Erom the time when, fifty years ago, the earlier researches of Sehecle and Seebeck on lightsensitive compounds were first wrought into practical shape by Niepce, Daguerre and Tatbot. the applications of photochemistry have increased in number and extent to such a degree that to-day the various processes of photographic reproduction would require a long catalogue to merely name them. Many of these variations, though ....... are Vor,. CXXXIV z3
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