## A Textbook of Electric Lighting and Railways, Volume 1 |

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acts amount amperes angles applied armature base belt body branches brushes called cause cell circle circuit closed coil conductor connected core decimal denominator diameter difference difference of potential direction distance divided driving dynamo effect electricity electromotive force energy equal example expressed external feet field figure flowing formula friction gear give given Hence inches increase indicated iron known length lines of force load loss machine magnetic magnetic field measured minute motion move multiplied obtained ohms opposite parallel pass pitch plane pole position pounds PRACTICE pressure pulley raise ratio reduced remaining represent resistance result ring root rotated rule separate shaft shown side SOLUTION space speed square strength substance surface teeth tends tion turns unit volts watts weight wheel wire

### Popular passages

Page 43 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.

Page 18 - 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.

Page 19 - TROY WEIGHT. 24 grains (gr.) = 1 pennyweight (pwt.). 20 pennyweights = 1 ounce (oz.). 12 ounces = 1 pound (lb.). 351. Apothecaries' weight is used in mixing medicines and in selling them at retail. APOTHECARIES

Page 19 - Cubic Measure 1728 cubic inches (cu. in.) =1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...

Page 49 - The terms of a ratio are the two numbers to be compared ; thus, in the above ratio, 20 and 4 are the terms. When both terms are considered together, they are called a couplet ; when considered separately, the first term is called the antecedent, and the second term the consequent. Thus, in the ratio 20 : 4, 20 and 4 form a couplet, and 20 is the antecedent, and 4 the consequent.

Page 29 - If a straight line be drawn through two sides of a triangle, parallel to the third side, a second triangle will be formed whose sides will be proportional to the corresponding sides of the first triangle.

Page 2 - The first and fourth terms of a proportion are called the extremes, and the second and third terms, the means. Thus, in the foregoing proportion, 8 and 3 are the extremes and 4 and 6 are the means.

Page 17 - The number to be repeated is called the MULTIPLICAND ; the number which shows how many times the multiplicand is to be taken is called the MULTIPLIER ; the result of the multiplication is called the PRODUCT.

Page 11 - As a unit of current, the international ampere, which is onetenth of the unit of current of the cgs system of electromagnetic units, and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, and in accordance with accompanying specifications, deposits silver at the rate of 0.001118 of a gramme per second.

Page 22 - A circle is a plane figure bounded by a curved line, called the circumference, every point of which is equally distant from a point within called the center.