Thanks Jerevan!! (and piticu, of course.)

Your instincts are great. This is an excellent book for the folks likely visiting this sub-forum. It was the first in a series of revised editions over many years, first written by Mees, and then by Mees and James (the third edition is the one so often mentioned about sensitizing dyes.) Each revision dropped out or condensed information that had become 'obsolete', but of course, obsolete is just another word for gold mine to some of us . This first 1942 edition is most valuable for its extensive coverage of gelatin.