Famous Chemists

Famous Chemists

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ...with Laurent's views as to unchanged properties. But after Dumas discovered trichloracetic acid he came round to Laurent's opinion. In 1839 Dumas converted his substitution theory into his theory of types. 1. "The elements of a compound body can in many cases, be replaced by equivalents of other elements or of compound bodies, which play the part of simple ones. 2. If such a substitution takes place, equivalent for equivalent, the compound in which the replacement has occurred retains its chemical type, and the element or group which has been taken up, plays in it the same part as the element which has gone out." The following are examples of types: Dumas also recognised meclianical types, which are groups of substances possessing entirely different properties but containing the same number of equivalents. Marsh gas C2H2H Formic Acid C2H203 Chloroform QH2Cl, FRIEDRICH WOHLER 1800-1882 FRIEDRICH WOHLER was born at Eschersheim, 31st July, 1800. His father, August Anton Wohler, was one of the leading citizens of Frankfort. Like Liebig, Wohler did not distinguish himself during his school days, and instead of conning his task would spend his time experimenting on his own account and collecting specimens. His scientific tastes were encouraged by Dr. Buch, a retired physician, who helped him with chemistry and physics. The elder Wohler taught his son sketching and made him familiar with the best German literature, and above all instilled in him that love of outdoor life and exercise to which he probably owed his exceptionally good health. Wohler studied medicine at the University of Marburg, and obtained his degree in 1823. He worked for a time jn the Hejdelburg laboratory under Gmelin, and went from there to study under Berzelius at...show more

Product details

  • Paperback | 42 pages
  • 189 x 246 x 2mm | 95g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236581261
  • 9781236581266