The Iron-founder: A Comprehensive Treatise on the Art of Moulding

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John Wiley & Sons, 1893 - 382 pages

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Page 102 - ... multiply the square of the diameter by ,7854 and the product will be- the area.
Page 110 - The surface of a sphere is equal to the convex surface of the circumscribing cylinder ; and the solidity of the sphere is two thirds the solidity of the circumscribing cylinder.
Page 94 - ... for the answer. RULE. — Multiply the decimal by that number which will reduce it to the next lower denomination, and point off as in multiplication of decimals.
Page 108 - INCLUDED BETWEEN THE CIRCUMFERENCE OF TWO CONCENTRIC CIRCLES, AB AND CD, FIG. 34. Rule. — Multiply the sum of the two diameters by their difference and this product by .7854 for the area. Then multiply the area by the thickness and again by the weight of a cubic inch; the product will be the weight of the ring in pounds. Example.
Page 82 - The sign x denotes that the numbers between which it is placed are to be multiplied together; as, 5 x 3 (read 5 multiplied by 3) = 15.
Page 368 - ... 40 square rods, 1 square rood. 4 square roods, 1 square acre. 640 square acres, 1 square mile. 1 1 . Solid, or Cubic Measure. 1728 solid inches make 1 solid foot. 40 feet of round timber, oi > . . , , 50 feet of hewn timber, 1 ton or load...
Page 371 - Gramme, which is the weight of a cubic centimetre of distilled water, is the element for all weights.
Page 345 - A Cast Iron beam will be bent to one-third of its breaking weight, if the load is laid on gradually, and one-sixth of it, if laid on at once, will produce the same effect, if the weight of the beam is small compared with the weight laid on. Hence, Beams of cast iron should be made capable of bearing more than six times the greatest weight which will be laid upon them.
Page 322 - Coal-Measures, interstratified with, and generally in close proximity to, the seams of coal, in beds varying from a few inches to many yards in thickness. They are locally known as "clunches" and " underclays," and are supposed to represent the soil that produced the vegetation from which the coal was formed.
Page 328 - ... with syrup, the wellknown cordial of this name. ANNEALING. The process by which metallic, and other mineral productions, are converted from a brittle to a comparatively tough quality, presumed to be caused by a new arrangement of their constituent particles. In a considerable number of bodies that will bear ignition, it is found that sudden cooling renders them hard and brittle, while, on the contrary, if they are allowed to cool very gradually, they become softened or annealed. We have, however,...

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