The New Tinsmith's Helper and Pattern Book: A Textbook and Working Guide for the Ambitious Apprentice, Busy Mechanic Or Trade School Student

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U.P.C. book Company, 1917 - Tinsmithing - 359 pages
 

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Page 5 - From eight times the chord of half the arc subtract the chord of the whole arc, and one-third of the remainder will be the length, nearly.
Page 14 - To find the solidity of a sphere. RULE. — Multiply the cube of the diameter by .523598, and the product is the solidity.
Page 236 - Take 2 parts of sulphur, and i part, by weight, of fine black lead ; put the sulphur in an old iron pan, holding it over the fire until it begins to melt, then add the lead, stir well until all is mixed and melted, then pour out on an iron plate or smooth stone. When cool, break into small pieces. A sufficient quantity of this compound being placed upon the crack of the iron pot to be mended, can be soldered by a hot iron in the same way a tinsmith solders his sheets. If there is a small hole in...
Page 8 - To Find the Convex Surface of a Frustum of a Cone or Pyramid. Rule: Multiply the sum of the circumference of the two ends by the slant height and half the product will be the slant surface.
Page 315 - US double eagle, $20, gold = 516 T. grains Troy weight is used for weighing gold and silver. The grain is the same as Avoirdupois, Troy, and Apothecaries' weights. • A carat, for weighing diamonds = 3.168 grains = 0.200 gramme. In gold it indicates the fineness and means 1/24 part: Thus 18 carats fine is 18/24 gold and 6/24 alloy. TABLE...
Page 317 - The GRAM is the primary unit of weights, and is the weight in a vacuum of a cubic centimeter of distilled water at the temperature of 39.2 F.
Page 8 - Rule 1 . — Multiply the circumference of the base by the slant height, and half the product is the slant surface.

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