Baltimore: Johns Hopkins, 1922. 1st Edition. SCARCE CONTEMPORARY JOURNAL REPRINT "A Photo-electric Theory of Color Vision" is Clark's challenge to the other theories holding sway at that time; among them, that of Young-Helmholz, the Hering and Ladd-Franklin theory, Leboucq's, Joly's, and Cajal's. Item #260
CONDITION & DETAILS: Baltimore: John Hopkins University. Bound in original paper wraps with very minor edge wear. Interior and exterior in very good condition.