Bausch & Lomb Optical Co. Projection Apparatus
A 1917 trade catalogue issued by the Bausch & Lomb Optical Co. of Rochester, New York, listing projection lanterns, projection microscopes and optical bench fittings for schools, lecture halls and laboratories. The plates are retouched halftone photographs of cast-iron and brass apparatus in strict side view, lit to show lens barrels, lamp housings, knurled knobs and clamp mounts against blank grounds, with numbered figure captions below: useful as machine-age silhouettes, instrument details and diagram-style profiles.
