The practical index of photographic exposure : with an appendix as to sensitometer numbers and rapidity of plates
A technical handbook by A. R. Wormald, published in Sutton, Surrey in 1888, for photographers working out exposure times and plate speeds. The only picture is a printed advertisement card for the London Stereoscopic and Photographic Company's Perfect Photometer, set in red and black capitals within a ruled border. It offers a plain model for a designer working with typographic hierarchy, centred layout, and decorative rules in Victorian trade printing.
