Wilson's quarter century in photography : a collection of hints on practical photography which form a complete text-book of the art (1887)
Wilson, Edward L. (Edward Livingston), 1838-1903 · New York : E.L. Wilson · leaf 290
glass to within an eighth of an inch of the top ; this ridge was perforated with, say, four or five holes, of a bridge-like shape. A filter, which stopped up the holes, was placed on the back of this ridge. The silver solution is now put into the tray ; the latter is then immediately brought from a… … ViDAL. Mr. Kruse, of Berlin, has invented an ingenious negative numberer, which may be thus described : A small benzine light (or candle) is placed in a metal lantern, so constructed.
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
