FECHNER, Gustav Theodor (1801-1887). Elemente der Psychophysik. Leipzig: Breitkopf und Hrtel, 1860.

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FECHNER, Gustav Theodor (1801-1887). Elemente der Psychophysik. Leipzig: Breitkopf und Hrtel, 1860.

2 volumes, 8o (214 x 138 mm). (Vol. 2 lacks half-title, some even browning to text.) Contemporary half cloth. Provenance: Ernst Mach (1838-1916), physicist and psychologist (ink stamp on title-page of each volume).

FIRST EDITION. ERNST MACH'S COPY. "The first treatise on the subject. Fechner applied the laws of mathematical physics to the physiology of sensation. He discussed the functional relations of the dependence between mind and body and investigated the cutaneous and muscular senses" (Garrison-Morton 4972). Norman 771.

[With:]

FECHNER, Gustav Theodor. Die drei Motive und Grnde des Glaubens. Leipzig: Breitkopf und Hrtel, 1863. 8o (184 x 115 mm). Original cloth. Provenance: Ernst Mach (ink stamp on title-page, autograph note from Fecher signed "vom Verfasser" mounted on front pastedown, with a photograph of Fechner mounted on front pastedown). ERNST MACH'S COPY OF THE FIRST EDITION. Norman 773. (3)