Pigments, paint, and painting; a practical book for practical men (1893)
Terry, George · London, E. & F.N. Spon; New York, Spon & Chamberlain · leaf 259
WHITES. 239 Agitation of the contents of the vessel is effected by means of the circulating pump c, which, drawing off supernatant liquor along with air and ammonia vapour from the upper
Pigments · Paint
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
