Experimental Psychology: Fechner's Great Work: Elements of Psychophysics , volume 1. Gustav Theodor Fechner. Translated from the German edition (1860) by Helmut R. Adler. Davis H. Howes and Edwin G. Boring, Translation Eds. Holt, Rinehart, and Winston, New York, 1966. 320 pp., illus. $6. · Study