114452-01
On some analogies between the phaenomena of the chemical rays, and those of radiant heat. SS. 195-210. Mit 1 Tafel. In: Philosophical Magazine and Journal of Science. Vol. 19, No. 123.
London, 1841. - (22 x 14,5 cm). SS. (177)-255. Mit 1 lithographierten Tafel. Rückenbroschur, unaufgeschnitten.
Erste Ausgabe dieser bedeutenden Arbeit zum Grotthuss-Draper-Gesetz (auch Prinzip der photochemischen Aktivierung genannt). Es ist eines der beiden Grundgesetze der Photochemie und besagt, dass nur das Licht, das von einem System absorbiert wird, eine photochemische Veränderung hervorrufen kann. - "Draper's grasp of the uses to which photography could be put and his ingenuity in accomplishing the requisite feats made him a technical innovator of considerable importance; but this was merely incidental to a much deeper concern with the chemical effects of radiant energy in general. By his researches in this field, Draper became easily one of the dozen most important contributors to basic science in the United States before 1870. He enunciated in 1841 the principle that only absorbed rays produce chemical change - long known as Draper's law but eventually rechristened the Grotthuss or Grotthuss-Draper law from its formulation by the German C. J. D. Grotthuss in 1817. Grotthuss' statement attracted no attention until the close of the nineteenth century, by which time the principle had become well established under Draper's (entirely independent) auspices" (DSB). - Die Tafel etwas braunfleckig, sonst sauber und gut erhalten. - DSB 4, 181; Poggendorff I, 601
On some analogies between the phaenomena of the chemical rays, and those of radiant heat. SS. 195-210. Mit 1 Tafel. In: Philosophical Magazine and Journal of Science. Vol. 19, No. 123.
London, 1841. - (22 x 14,5 cm). SS. (177)-255. Mit 1 lithographierten Tafel. Rückenbroschur, unaufgeschnitten.
Erste Ausgabe dieser bedeutenden Arbeit zum Grotthuss-Draper-Gesetz (auch Prinzip der photochemischen Aktivierung genannt). Es ist eines der beiden Grundgesetze der Photochemie und besagt, dass nur das Licht, das von einem System absorbiert wird, eine photochemische Veränderung hervorrufen kann. - "Draper's grasp of the uses to which photography could be put and his ingenuity in accomplishing the requisite feats made him a technical innovator of considerable importance; but this was merely incidental to a much deeper concern with the chemical effects of radiant energy in general. By his researches in this field, Draper became easily one of the dozen most important contributors to basic science in the United States before 1870. He enunciated in 1841 the principle that only absorbed rays produce chemical change - long known as Draper's law but eventually rechristened the Grotthuss or Grotthuss-Draper law from its formulation by the German C. J. D. Grotthuss in 1817. Grotthuss' statement attracted no attention until the close of the nineteenth century, by which time the principle had become well established under Draper's (entirely independent) auspices" (DSB). - Die Tafel etwas braunfleckig, sonst sauber und gut erhalten. - DSB 4, 181; Poggendorff I, 601
450 €