FECHNER, Gustav Theodor (1801-1887). Elemente der Psychophysik. Leipzig: Breitkopf und Hrtel, 1860. 2 volumes. Modern half sheep, original printed wrappers preserved. Provenance: Otto Fller (inscription on half-title verso of Vol. 2). FIRST EDITION. Garrison-Morton 4972; Norman 772. -- Vorschule der Aesthetik. Leipzig: Breitkopf & Hrtel, 1876. 2 volumes. Original half cloth. FIRST EDITION. "Fecher believed that the foundations of aesthetics could be established on a factual basis by using the methods of experimental psychology (particularly that of paired comparisons) to measure preferences for color, shape, proportion, etc." (Norman 774). -- In Sachen der Psychophysik. Leipzig: Breitkopf & Hrtel, 1877. Original gray printed wrappers, uncut (rebacked); cloth folding case. FIRST EDITION. Norman 775. Together 3 works in 5 volumes, 8o. (5)

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FECHNER, Gustav Theodor (1801-1887). Elemente der Psychophysik. Leipzig: Breitkopf und Hrtel, 1860. 2 volumes. Modern half sheep, original printed wrappers preserved. Provenance: Otto Fller (inscription on half-title verso of Vol. 2). FIRST EDITION. Garrison-Morton 4972; Norman 772. -- Vorschule der Aesthetik. Leipzig: Breitkopf & Hrtel, 1876. 2 volumes. Original half cloth. FIRST EDITION. "Fecher believed that the foundations of aesthetics could be established on a factual basis by using the methods of experimental psychology (particularly that of paired comparisons) to measure preferences for color, shape, proportion, etc." (Norman 774). -- In Sachen der Psychophysik. Leipzig: Breitkopf & Hrtel, 1877. Original gray printed wrappers, uncut (rebacked); cloth folding case. FIRST EDITION. Norman 775. Together 3 works in 5 volumes, 8o. (5)