The Series of Plates Designed as Tests for Colour-Blindness
7th edition (reduced edition), 1936. Featuring 11 color plates mounted on black cardstock and folded accordion-style into hardcover cloth binding. 7.75 x 6 inches. With 11pp introductory text/instructions in English, French, and German, and handsome photogravure portrait of Dr. Ishihara. Binding VG with light soil and rubbing to cloth, Rear pastedown with sticker serial no. 12326 from Stoelting Co. of Chicago, distributor of various psychological and physiological testing supplies.