Bulletin Volume 1-22

Bulletin Volume 1-22

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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. 1899 edition. Excerpt: ...At the end of this time the mixture still had a temperature of 32. As the boiling point of prussic acid is 26, the temperature throughout the entire forty minutes was sufficient to volatilize the prussic acid. When four ounces ol water were mixed with one ounce of acid, a temperature of but 81" was secured and while this is still far above the boiling point of prussic acid, it is very doubtful if the temperature of the mixture would be above z6i" at the end of forty minutes. Two There may of course be other cyanides upon the market which will meet all requirements for furniHting purposes, but we have exercised reasonable diligence in searching for them and our efforts have not met with success. ounces of water and one of acid would of course give an initial temperature of iicr, but owing to the reduced volume of the mixture the introduction of the one ounce of cyanide would cause a much greater reduction of temperature than when the two ounces of acid and four of water are used. It is also very probable that as much as four ounces of water are necessary to properly dissolve the potassium bisulphate tormed, in order to prevent this bisulphate from forming a deposit about the KCN, thereby reducing the amount of prussic acid generated. The mixture of four ounces of water and two of acid, to each ounce of cyanide, meets every requirement in that it permits volatilization of an apparently maximum amount of prussic acid, and we do not consider a change to a more dilute acid or to a lesser amount of water and acid as advisable. CONCLUSIONS. I.--Failure to obtain satisfactory results in fumigating nursery stock has in many cases been due to the use of impure or adulterated cyanide, which is often represented and sold as being pure. 2.--In...show more

Product details

  • Paperback | 146 pages
  • 189 x 246 x 8mm | 272g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236491343
  • 9781236491343