Pringle, Andrew · New York : Scovill & Adams Company of New York · leaf 73
glass by the grinding. If it is found that the colors are not inclined to be smoothly on the surface, a little treatment of the latter with ox gall will set matters right. If a glass plate be licked all over with the tongue and allowed to dry, a pen and ink will write on it easily, and with- out…
Slides (Photography)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
