Scientific American

Scientific American

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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. 1858 edition. Excerpt: ... the thickness of the metal; also the diameter and length of boiler. The space of three inches exposed to high heat in your boiler, when this water is flush with the lower gage cock, will not readily becomo red-hot; still, you should never allow the water to fall so low. R. E. M.. of Ohio.--Machines to keep up currents of air in hot rooms, and to bruah away flies and musqultoes, are known and used in some sections. As early as 1630 Commodore Barron, of the United States Navy secured a patent for a mechanical device of this character, M. A., of Pa The question is not " who first filed the caveat," but who first made the invention. When applications for the patent are made by each caveator, then the Office will, before issuing patents to either, require proof upon the question of priority of Invention. A, J of R. I.--An opening Bl( inches and % wide, under a head of SOJf feet, will discharge 1,909 cubic feet of water, and your turbine wheel, with 30 such openings, will therefore discharge 54,270 cubic feet per second. The wocd M botany" is derived from the Greek word bntane, gross or plant, and it is hence applied to the science which treats of the nature and varieties of plants. Tiie largest starseen in the sky is one in the South, called the Dog-Star. From calculations, it is known that its distance from us is not less than nineteen millions of millions of miles. Other stars have been calculated to be forty-two thousand times more distant than it, and light, which travels at the rate of a million of miles in five seconds, must be sixty-three thousand years In traveling from them to the eaith. S. WM of N. Y.--Milk is sold in a frozen state in our Northern cities, and also in Canada. You could not get a patent for euch a...
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Product details

  • Paperback | 986 pages
  • 189 x 246 x 49mm | 1,724g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236642279
  • 9781236642271