The Book of the Farm Volume 1

The Book of the Farm Volume 1

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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. 1889 edition. Excerpt: ...horizontally along the inside of the barrel of the boiler, and forming a connection between the fire-box and the smoke-box. These tubes are entirely surrounded by water, contained within the cylindrical jxirtion of the boiler. The hot gases in passing along these tubes from the fire-box to the smoke-box impart a great deal of their heat to the water through which they pass, thus increasing the evaporative power of the boiler. This form of generator has proved in practice the most economical extant; while for safety, convenience of size, and weight, it leaves little to be desired. Recent experiments have shown that with this class of boiler, specially constructed for agricultural purposes, as much as 12 J lb. of water can be evaporated with 1 lb. of good Welsh coal. This is an exceedingly good result, and is no doubt mainly due to the large amount of heating-surface which these boilers possess, which varies from 18 to 20 square feet per nominal horse-power. Advantages of the Locomotive Type.--A considerable amount of prejudice exists in the minds of many agriculturists against this very useful and effective type of boiler. It seems to be based upon the supposition that it is either more dangerous, more difficult to fire, or more liable to run short of water than the more clumsy types already described. As a matter of fact, nothing could be more mistaken than such ideas or prejudices. With regard to danger, a boiler of this class, properly constructed and efficiently stayed, has a much larger factor of safety than any of the other types of boiler already described, and it may be worked without danger at a much higher pressure of steam than it would be judicious to use in any of the others. The difficulty of firing, instead of being greater, is very...show more

Product details

  • Paperback | 152 pages
  • 189 x 246 x 8mm | 286g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236574540
  • 9781236574541