Contents of the Collection The Joseph Gertler French Glass Plates Collection is comprised of 115 glass plate positives and negatives depicting aircraft in France, circa 1917-1935. The majority of images are stereoscopic format.The glass plates have been organized into eight sets based on original groupings. Sets one through six likely originated from the same source as there is overlap in subject matter. Sets one through four were originally housed in identical containers within a larger cardboard box. The...