Bulletin Volume 38-44

Bulletin Volume 38-44

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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. 1903 edition. Excerpt: ...the Oak several times over. It would be a great waste, therefore, to attempt the treatment of White Oak or Longleaf Pine when better results will be obtained by using Loblolly Pine or Red Oak. One of the first steps in the process of making short-lived timbers fit for treatment consists in a proper seasoning. More benefit will result from taking care of the short-lived timbers than from similar treatment of those with longer life. The former are frequently short lived because of their greater porosity, which may mean a higher water content, and which always means a greater power of absorbing and holding water. The economical substitution of cheap for high-priced timbers is impossible without proper seasoning. The loss from the shortened term of service of unseasoned timber is very much greater in the case of porous than of the denser kinds, which arc much less permeable by water, and consequently offer greater resistance to decay. Susceptibility to decay in timber is a consequence both of relatively high porosity, which may mean a high water content, and always means a greater absorptive power, and of a large percentage of sapwood. which furnishes, by its stores of organic matter, food for wood-destroying fungi. Seasoning greatly lengthens its life, because it rids it as far as possible of its water and brings about a disintegration of much of the organic matter, in both ways lessening the chances for destruction of the wood by its fungus enemies. Seasoning is therefore of the first importance for the utilization of cheap timbers hitherto regarded as short-lived. PREVENTION OF CHECKING AND SPLITTING. Under present methods much timber is rendered unfit for use by improper seasoning. PI. Ill furnishes a good example of this. Green timber, ..show more

Product details

  • Paperback | 96 pages
  • 189 x 246 x 5mm | 186g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236925416
  • 9781236925411