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"Pseudo-Isochromatic Plates For Testing Color Perception" American Optical 1940, US $59.95 – Picture 0
"Pseudo-Isochromatic Plates For Testing Color Perception" American Optical 1940, US $59.95 – Picture 1
"Pseudo-Isochromatic Plates For Testing Color Perception" American Optical 1940, US $59.95 – Picture 0
"Pseudo-Isochromatic Plates For Testing Color Perception" American Optical 1940, US $59.95 – Picture 1

"pseudo-isochromatic Plates For Testing Color Perception" American Optical 1940

US $59.95

  • Cambridge, Massachusetts, United States
  • Jan 30th
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American Optical Co., Philadelphia, 1940.   Book Condition: Near Fine.  Illustrated. 8vo. Blue cloth covered boards with gilt stamped titles. In a light blue paper covered slipcase. The slipcase is in good condition.  Highly interesting test checking for color blindness, 46 color plates mounted on a black accordion board that folds neatly into the black covers with gold lettering. a pamphlet explaining the process is tucked into a sleeve on the verso of cover. 1940, the color inks were produced by IPI, the picture of various color dots with a letter or figure hidden into it was engraved and printed by the Beck Engraving Co. of Philadelphia.
Condition:
Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections. ...
Brand American Optical
Country of Manufacture United States

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