‎"FECHNER, G.TH.‎
‎Ueber den Ausgangswerth der kleinsten Abweichungssumme, dessen Bestimmung, Verwendung und Verallgemeinerung.‎

‎Leipzig, S. Hirzel, 1874. Small 4to. Orig. printed wrappers. (4),76 pp. Offprint from ""Des XI. Bandes d. Abh. d. math.-phys. Classe d. Königl. Sächsischen Gesells. d. Wissensch. No. I"" A few pencil underlinings, otherwise fine and clean.‎

Reference : 28831

‎First edition in the scarce offprint. Fechner is known as the founder of psychophysics, his theory of psycho-physical paralellism, as the first universal indeterminist and by the so-called ""Fecnner-Weber Law"". - Freud said:""I was always open to the Ideas of Fechner and have followed that thinker upon many importent points."" (Freud, 1925 p. 86).‎