The Practical photographer; an illustrated monthly of technical photography (1904)
Boston [etc., Photo era publishing company] · leaf 94
of glass, clamped by the pieces M,N, and separated at the ends and bottom by BB. This separator, which takes the form of “ three-sides-of-a-square ” — really two short and one long side — may be built up out of pieces cut lengthways from a plank of uniform thickness. The various pieces are fitted… … In this Fig. the two clamping pieces at the bottom are omitted so that the shape of the separator may be seen. m
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
