Kodak Monographs available for download. These are very old and out of copyright. Available for free download as PDF. Kodak Monograph 1 - The silver bromide grain of photographic emulsions (1921) http://www.archive.org/details/silverbromidegra00trivrich Kodak Monograph 2 - The theory of development. (1922) http://www.archive.org/details/theoryofdevelopm00nietrich The photographic negative. Very old. Has many interesting chapters however. http://www.archive.org/details/photographicnega00burbiala (I have no affliation with the above site. It is a well known archive of copyright free materials). Emulsion.