Treasury of Knowledge; In Three Parts

Treasury of Knowledge; In Three Parts

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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. 1849 edition. Excerpt: ...The solid part of the horn, near the tip, is then cut off, and preserved to be used in making knife-handles, buttons, &c.; the remainder is softened by boiling water, and exposure to the flame of a fire. In this state it is slit with a knife, and pressed flat between hot iron plates. If required for thin sheets for lanterns, it is pressed with great force, then split into thin layers, smoothed by scraping, and afterwards polished. When prepared for combs, the horn is slightly pressed and cut into the required shape by a saw and rasps; the teeth are then cut by a saw, and finished by rasping. If a very large piece of horn is required for a comb, or any other article, two pieces are joined together by heating the edges until they are quite soft, and pressing them together firmly till they are cold. 323. By what animals is horn yielded? 324. What of its structure, and peculiaritiea? 325. How is it prepared for use in the arts f 326. Name the various uses to which horn is applied t Drinking cups are formed by moulding the hollow part of the horn (softened by heat) into a regular shape--it is then polished. A deep groove is afterwards cut or turned near the bottom; it is again softened by heat, and a flat piece of horn, of the proper size, forced into the groove. The cup contracts as it cools, and the joint is perfectly water-tight. Horns were anciently used in making the musical instrument so called: the name still remains; thus we have the bugle-hom, &c. Horse-hair.--By this name is generally meant the hair of the tail and of the mane of a horse. The long hair of the tail is woven into a kind of coarse cloth for sieves; also into a fabric for covering sofas, chairs, &c.; but in this case the horse-hair only runs in one direction, more

Product details

  • Paperback | 138 pages
  • 189 x 246 x 8mm | 259g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236565398
  • 9781236565396