Special Agents Series Volume 159-168

Special Agents Series Volume 159-168

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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. 1918 edition. Excerpt: ...used in the United States. It will thus be easily realized that, while the number of plants and trees in Latin America vielding notable amounts of tannin is limited, one of these plays tbe leading role in the world's leather industry. QUEBRACHO. The name " quebracho " is derived from the Portuguese " quebrar," break, and "hacha," ax. Its literal meaning is "ax breaker." Formerly the term was applied to every hardwood tree in South America that dulled the chopper's tools. It is now used commercially in connection with but three trees, the true quebracho, the white quebracho, and the red quebracho. The latter two are of no importance as sources of tannin. Much confusion has resulted from the indiscriminate use of the name for totally different varieties of wood. The true quebracho, Loxopterygium or Qucbrachia lorentzii Griseb., belongs to the family of the Awacardiaceae, or cashew family, and to the genus Quehrachia. It is found in Argentina Bolivia, Brazil, Paraguay, and Uruguay. The more specific habitat is a district extending eastward some 500 miles from the Andes Mountains, and reaching northward from near the mouth of the Parana River for a distance of about 600 miles. The area of this district is, roughly, 300,000 square miles. The territory in which the tree is industrially exploited includes the northern portion of Argentina and the Province of Chaco in Paraguay. At the present rate of consumption, it is estimated that the annual cut of quebracho is much less than the sum total of annual growth. The total available supply is estimated at 168,000,000 tons. Less than 1,000,000 tons are cut annually at present. The quebracho is never found in pure stands. It is scattered through open forests...
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Product details

  • Paperback | 372 pages
  • 189 x 246 x 20mm | 662g
  • United States
  • English
  • black & white illustrations
  • 1236752600
  • 9781236752604