The Edwal Laboratories, Inc. The Edwal Professional Photographers’ Manual. Chicago: Edwal Laboratories, Inc., 1942. Second printing, September 1942. 40 pages, 21,5 cm, heavy blue paper wrapper.
A manual of formulas, operating directions, and other useful information about Edwal-12 (the fine grain developer for speed work); Edwal-20 (for finest possible grain consistent with good negative quality); general purpose and print developers; Edwal fixers (quick fix and liquid fix); Mansfield products (toners, developers, etc); weights and measures, temperature conversion tables; and prepared photo chemical products.
Occasional pencil annotation, otherwise very good.