Hunt, Robert, 1807-1887, author, Contained in (work): Hunt, Robert, 1807-1887. Manual of photography · London ; Glasgow : Richard Griffin and Company · leaf 117
or the purpose of carrying with safety the silver solution. This trough is of gutta pereha ; the head is partly of mahogany, secured by brass screws ; close contact is insured by means of a piece of vulcanized caoutchouc, but this is kept from contact with the solutions of silver, by the… … Fig. 45.
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
