The practical printer : a complete manual of photographic printing (1874)
Hearn, Charles W · Philadelphia : Benerman & Wilson · leaf 215
MOULTOX’S RAPID PHOTO-WASHER. … NEW IN PRINCIPLE. QUICK AND RELIABLE IN PRACTICE. Patented August 12th, 1873. Instead of soaking the prints it applies the water in the form of spray, with considerable force, to both sides of the paper at each revolution, or from one hundred to one hundred and fifty times per minute. Washes with…
Photography -- Printing processes · Photographs on porcelain
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.