Appletons' Cyclopaedia of Applied Mechanics; A Dictionary of Mechanical Engineering and the Mechanical Arts, Illustrated with Nearly Five Thousand Eng

Appletons' Cyclopaedia of Applied Mechanics; A Dictionary of Mechanical Engineering and the Mechanical Arts, Illustrated with Nearly Five Thousand Eng

List price: US$67.85

Currently unavailable

Add to wishlist

AbeBooks may have this title (opens in new window).

Try AbeBooks

Description

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. 1880 edition. Excerpt: ...into dry elm, to the depth ot 1 in. across the grain, required a pressure of 327 lbs. to extract it; and the same nail driven endwise or longitudinally into the same wood was extracted with a pull of 257 lbs. The same nail driven 2 in. endwise into dry Christiania deal was drawn by a pull of 257 lbs.; and to draw out one inch under like circumstances took 87 lbs. only. The relative adhesion therefore in the same wood, when driven transversely and longitudinally, is as 100 to 78, or about 4 to 3, in dry elm, and 100 to 46, or about 2 to 1, in deal; and in like circumstances the relative adhesion to elm and deal is as 2 or 3 to 1. The progressive depths to which a sixpenny nail was driven into dry Christiania deal by simple pressure were as follows: Depth, inches, .25, .5, 1, 1.5, 2. Pressure, lbs., 24, 76, 235, 400, 610. In the above experiments, great care was taken by Mr. Bevan to apply the weight steadily, and toward the conclusion of each experiment the additions did not exceed 10 lbs. at one time, with a moderate interval between, generally about 1 minute, sometimes 10 or 20 minutes. In other species of wood the requisite force to extract the nail was different. Thus, to extract a common sixpenny nail from a depth of 1 in. out of dry oak required 607 lbs.; out of dry beech, 667 lbs.; and out of green sycamore, 313 lbs. From these experiments we may infer that a common sixpenny nail, driven 2 in. into oak, would require a steady pull of more than half a ton to extract it. Ridged or Chelot nails have been made and experimented upon in France with good results. NARROW GAUGE. See Railroads, Construction Or NICKEL-PLATING. Sec Electro-metallurgy. NITRO-GLYCERINE. See Explosives. NOTCHING. See Carpentry. NUT-FORGING. See Forging Machines. NUTS AND.
show more

Product details

  • Paperback | 624 pages
  • 189 x 246 x 32mm | 1,098g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123662551X
  • 9781236625519