Die Lehre vom Tastsinne und Gemeingefühle auf Versuche gegründet von Ernst Heinrich Weber, Professor der Anatomie und Physiologie in Leipzig.

Weber, Ernst Heinrich

Date d'édition : 1851

A propos de cet article

Für Aerzte und Philosophen besonders abgedruckt aus Wagners Handwörterbuch der Physiologie. - Braunschweig, Verlag von Friedrich Vieweg und Sohn, 1851, 8°, VIII, 143 pp., orig. gelbe Broschur. Diese sehr seltene Einzelausgabe wurde von Ernst Heinrich Weber (1795-1878) durch ein ausführliches achtseitiges Inhaltsverzeichnis erweitert. Mit Namenszug von Sigmund Exner auf Umschlag, die Randläsuren des Umschlags restauriert, die obere rechte Ecke mit geringfügigem Wasserschaden, unbeschnittenes und gutes Exemplar dieses sehr seltenen Klassikers der Physiologie. Ernst Heinrich Weber (1795-1878) was the German anatomist and physiologist who first introduced the concept of the just-noticeable difference, that is, the smallest difference perceivable between two similar stimuli. Weber was a professor at the University of Leipzig from 1818 until 1871. He is known chiefly for his work on sensory response to weight, temperature, and pressure; he described a number of his experiments in this area in De Tactu (1834;"Concerning Touch"). Weber determined that there was a threshold of sensation that must be passed before an increase in the intensity of any stimulus could be detected; the amount of increase necessary to create sensation was the just-noticeable difference. He further observed that the difference was a ratio of the total intensity of sensation, rather than an absolute figure; thus, a greater weight must be added to a 100-pound load than to a 10-pound load for a man carrying the load to notice the change. Similar observations were made on other senses, including sight and hearing. Weber also described a terminal threshold for all senses, the maximum stimulus beyond which no further sensation could be registered. Weber's findings were elaborated in Der Tastsinn und das Gemeingefühl (1851; "The Sense of Touch and the Common Sensibility"), which was considered to be "the foundation stone of experimental psychology." Weber's empirical observations were expressed mathematically by Gustav Theodor Fechner, who called his formulation Weber's law. -cf. denis Leri. N° de réf. du vendeur 33886

Détails bibliographiques

Titre : Die Lehre vom Tastsinne und Gemeingefühle ...

Date d'édition : 1851

Reliure : Couverture souple

Etat de la jaquette : Jaquette