Catalogue Page from Exhibition Catalogue: 1902 Forty-seventh Annual Exhibition of the Royal Photographic Society of Great Britain

showing (E02A031) Exhibit no. 431: Enlarging Apparatus, fitted with Beard's Electric Arc Lamp, 9-inch Condenser, Rotating Negative Carrier for plates up to whole-plate size, and a means of swinging or tilting the negative by R. R. Beard ()