Practical photography : being the science and art of photography, developed for amateurs and beginners (1881)
Wheeler, Owen, 1859-1932 · London : "The Bazaar" Office · leaf 143
left undeveloped for more than three or four weeks the latent image seems to lose its proper vigour. Both plates and emulsion (washed), prepared according to Canon Beechey' s formulae, are obtainable of Mr. W. W. Eouch. We are indebted to Mr. Eouch for the suggestion that when working with Beechey…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
