Subject: The Farmer Collection. /2 - 121 photographs on small index cards from slides of Gunpowder Processing Lecture by Dr R C Farmer c1920. (see WASC 1094 for 6 enlarged photographs.)
Description: The Farmer Collection. /2 - 121 photographs on small index cards from slides of Gunpowder Processing Lecture by Dr R C Farmer c1920. (see WASC 1094 for 6 enlarged photographs.)
