Photographic Proofs and Apparatus.

Class 12.—Photographs on paper, glass, wood, stuffs, and enamel. Heliographic engravings, lithographic proofs. Photo-lithographic proofs, photographic stereotypes, stereoscopic proofs, and stereoscopes. Enlarged photographs. Coloured photographs.

Instruments, apparatus, and chemicals necessary for photography. Materials and appliances used in photographic studios.