Not to discourage anyone from buying James' book; it is a great resource, but the dry plate chapter was written by Mark Osterman, and edited shorter and less comprehensive to fit into a survey book. Mark has published his complete original article, with additional illustrations as well as additional content, on The Light Farm, a free source of information on silver gelatin emulsion making.

http://thelightfarm.com/Map/Books/Osterman/MapTopic.htm
http://thelightfarm.com/Map/DryPlate...PlatePart4.htm