pseudo-isochromatic plates
Date: 1940
Inventory Number: WJ1221
Classification: Color Blindness Apparatus
Subject:
Manufacturer: American Optical Company (1833-present)
Publisher: Beck Engraving Company (founded 1897)
Cultural Region:
Place of Origin:
Dimensions:
closed book: 23.5 x 15.5 x 1.8 cm (9 1/4 x 6 1/8 x 11/16 in.)
Description:
Slim blue volume containing 46 different plates for testing color blindness. Also included are an instruction manual and a small card detailing proper handling of the test volume itself.
Signedon cover: AMERICAN OPTICAL COMPANY
Inscribedon cover: PSEUDO-ISOCHROMATIC / PLATES / FOR / TESTING / COLOR PERCEPTION
on white cloth tape: MED. SEC. / EO. / Buffalo
inside: Engraved and Printed / by the / Beck Engraving Co., Inc. / PHILADELPHIA NEW YORK / Copr. 1940
on white cloth tape: MED. SEC. / EO. / Buffalo
inside: Engraved and Printed / by the / Beck Engraving Co., Inc. / PHILADELPHIA NEW YORK / Copr. 1940
ProvenancePsychology Department, William James Hall, Harvard University.