Catalogue Page from Exhibition Catalogue: 1911 Fifty-sixth Annual Exhibition of the Royal Photographic Society of Great Britain

showing (E11A067) Exhibit no. [971]: Compensating Filters for Autochrome Work, including Filters for use with artificial light, Electric Arc, Incandescent, Magnesium, Acetylene and Incandescent Gas, &c. by Sanger-Shepherd & Co., Ltd. ()