Concise instructions in the art of retouching (1876)
Ourdan, J. P, author, Burrows and Colton, London · London : Marion & Co. · leaf 22
ged together, with a plate of silvered glass embedded in the lower frame to reflect the light. The carriers are rebated to fit in the middle frame, and the upper frame is made solid to prevent the light reaching the retoucher’s eyes. The upper and middle frames are supported in position by means of…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
