Applied Chemistry; In Manufactures, Arts, and Domestic Economy

Applied Chemistry; In Manufactures, Arts, and Domestic Economy

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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. 1844 edition. Excerpt: ... very unequally in this manner, certain parts of the wood presenting far greater facilities for the transmission of the liquid than others. Those parts near the axis, where the tissue is denser than toward the surface, are scarcely at all penetrated by the solution. The impregnation also takes, place with extreme slowness; a piece of wood of about three feet three inches in length, and nine inches in diameter, continued to absorb water and increase in weight after having been submerged in water for ten months. To obtain a more perfect and rapid impregnation of the wood, Dr. Boucherie suggested the application of the aspirative force of the tree, the liquid being applied either to the base of the trunk or larger branches, or to the roots. It is indifferent whether the tree is still standing or recently felled. By this force, the liquid is absorbed, in the course of a few days, to a height of eighty or a hundred feet, and even penetrates to the leaves, t To impregnate a tree recently felled, the base of its trunk may be placed in a vat containing the solution of the preserving material, or else a bag of leather or sheet caoutchouc may be fastened water-tight around the base and put in communication by means of a pipe with a tank or cistern containing the solution. A poplar of about ninety feet in height, the base of which was placed in the month of September in a vat containing a solution of pyiolignite of iron of specific gravity 1.056, absorbed 3 hectolitres (very nearly 106 cubic feet) of the solution in the course of six days. The time which may be allowed to elapse between the felling of the tree and the impregnation varies according to the nature of the tree and the season of the year. At the end of September, a pine, the trunk of which more

Product details

  • Paperback | 116 pages
  • 189 x 246 x 6mm | 222g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236644484
  • 9781236644480