Handbook of the practice and art of photography (1875)
Vogel, Hermann Wilhelm, 1834-1898, Molling, Edward F · Philadelphia, Benerman & Wilson · leaf 49
s to force the sitter to the head-rest is guilty of " cruelty to animals," and is a sinner against good taste in the bar- gain. It is self-evident that this necessary evil must not be visible in the picture, a circumstance which often very sadly ties the hands of the photographer in making his… … Fig. 18 represents such an arrangement. It consists mainly of the board, B, with the ledge, r, r, which serves as a rest for oil-paintings or drawing-boards. It can be moved in a vertical direction, and by the binding-screw, K, kept in position so that plates of different size can be firmly held.…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.