Wire in Electrical Construction

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John A. Roebling's sons Company, 1916 - Electric wire - 147 pages
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Page 2 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30| square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq. mi.) Cubic Measure 1728 cubic inches (cu.
Page 5 - COUNTING. 12 units or things make 1 dozen. 12 dozen " 1 gross. 12 gross " 1 great gross. 20 units
Page 4 - TROY WEIGHT. 24 grains (gr.) 1 pennyweight (pwt.) 20 pennyweights, 1 ounce (oz.) 12 ounces ... 1 pound (Ib.) Troy weight is used in weighing gold, silver, precious stones, etc. APOTHECARIES
Page 3 - DRY MEASURE 2 pints (pt.) =1 quart (qt.) 8 quarts =1 peck (pk.) 4 pecks =1 bushel (bu...
Page 111 - Specific gravity. The specific gravity of a substance is the ratio of its weight to the weight of an equal volume of water.
Page 124 - The standard solution of copper sulphate shall consist of commercial copper sulphate crystals dissolved in cold water, about in the proportion of 36 parts, by weight, of crystals to 100 parts, by weight, of water.
Page 57 - At a temperature of 20C , the " constant mass" temperature coefficient of resistance of standard annealed copper, measured between two potential points rigidly fixed to the wire, is 0.00393 = 1/254.45.
Page 2 - A Gunter's Chain, used by land surveyors, is 4 rods or 66 feet long, and consists of 100 links. TABLE. % 7.92 inches (in.) make 1 link, 1. 25 links " 1 rod, rd. 4 rods, or 66 feet, " 1 chain . .ch. 80 chains
Page 124 - ... twelve hours with occasional stirring. Some undissolved crystals should remain at the bottom of the vessel at the end of this time. The solution shall be neutralized by the addition of an excess of cupric oxide. The neutralized solution shall then be filtered before using. (See note below. ) METHOD OF TESTING. Samples of wire previously cleaned with gasoline or benzine shall be immersed, to a distance of at least four inches, in a glass vessel containing not less than one pint of the standard...
Page 83 - A strand composed of a central core surrounded by one or more layers of helically laid wires or groups of wires.

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