The American Chemist Volume 6

The American Chemist Volume 6

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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. 1876 edition. Excerpt: ...of these examinations other causes leading to a decrease of free acid. The large increase of inorganic constituents, during the latter period of the process of ripening, explains this anomaly sufficiently well. The sugar must therefore be derived from the plant. His examinations of the grapevines have yielded him the following results: --1. Leaves, shootB, and young twigs contain no inconsiderable quantities of sugar, which may easily be separated from the other constituents and fermented. 2. Leaves, shoots, and yonng twigs ace very rich in hydropotassium tartrate, pectin substances, aud oxalate of lime. 3. Those substances of the most, which produce tli" peculiar ethers of wine, are likewise contained in other parts of the plant. Determination of humus In soil.--J. Moritz.--The author recommends Knop's method, which produces from the humus, by combustion, carbonic acid gas, which is conducted into a solution of haritimhydrate. The precipitated barium carbonate is filtered off and weighed, and the quantity of humus calculated according to the supposition that humus contains 60 per cent of carbon. Analyses of must and husks, made during the fall of the year 1868.--C. Neubauer.--During the year 1868 the author commenced a series of examinations, intended to afford a knowledge of the characteristics of the vines, which may be obtained from the vineyards in different years, and, at the same time, he proposes to use the results as an indicator of the productiveness of the soil. Of great practical importance are his chemical examinations of the husks. Husks can never he wholly freed from the must by pressing, and they will always contain considerable sugar; therefore he holds that they must be utilized, leaving, however, to the interested more

Product details

  • Paperback | 478 pages
  • 189 x 246 x 24mm | 844g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236486935
  • 9781236486936