American Fisheries; A History of the Menhaden

American Fisheries; A History of the Menhaden

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1880 edition. Excerpt: ...of the tissues to the action of the acid has thus far been an insurmountable obstacle to success, and will probably remain so. The "fish and potash salts" (class No. 7, above) is a mixture, as its name represents, of fish, half-dry scrap apparently, in the specimens I have seen, with German potash salts. The idea is a sound one, in that the salts used, doubtless of the lower grades, like Leopoldshall Kainit, and containing large percentages of chloride of sodinm (commou salt), Moisture Oil Per cent. Per cent.. 4.91 3.G7 Nitrogen 2.07 10.78 10.74 "Acidulated fish" and "fish and potash salts." would act as a preservative, and further, the potash supplies a lack in the fish and makes of it a " complete" fertilizer. The amounts of the " acidulated " fish and "fish and potash salts "in the market are so small as to give them very litUe importance. Manufacture of "ammoniated superphosphates." 297. The most important use of fish waste is in the manufacture of nitrogenous, 'ammoniated," superphospates. These fertilizers, which constitute by far the largest class in the market, owe their value mainly to the two ingredients, nitrogen and phosphoric acid. For phosphoric acid various fossil and mineral phosphates, particularly those from South Carolina and the Island of Navassa, are employed. Of late, mines of apatite have been opened in Canada, and promise to be a rich and important source of phosphates for this purpose. The waste boueblack from sugar refineries is also used in very large quantities for the same purpose. Bono meal is likewise employed, but to a limited extent. The phosphoric acid in all of these is in insoluble or very slowly soluble forms. To render it more...show more

Product details

  • Paperback
  • 189 x 246 x 12mm | 408g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123657141X
  • 9781236571410