Cantor lectures on recent advances in photography (1882)
Abney, William de Wiveleslie, Sir, 1843-1920, author, Society for the Encouragement of Arts, Manufactures, and Commerce (Great Britain) · London : Printed by William Trounce · leaf 19
expose the three slips of paper above alluded pure bromide of silver without anything. I to, and I will develop them before you. [The propose to develop those on the screen. I papers were developed in yellow light, as must give this rather a longer exposure than before.] The impression of the… … This is a spectrum of the dye, it lets the ultra¬ violet rays through ; in the green we have a great cutting off. Here we have the cyanine, the eosine dyed paper flashes out, the part in which is a different colour altogether. It the green comes out very strongly indeed. cuts off the yellow, and…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.