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Сторінка 265 - ATKINSON (PHILIP). The Elements of Electric Lighting, including Electric Generation. Measurement, Storage, and Distribution. Ninth edition. Fully revised and new matter added. Illustrated. 12mo, cloth 1 50 - The Elements of Dynamic Electricity and Magnetism.
Сторінка 68 - ... moving force destroyed by collision with the earth. Conversely, the amount of heat necessary to raise a pound of water one degree in temperature, would, if all applied mechanically, be competent to raise a pound weight 772 feet high, or it would raise 772 pounds one foot high. The term ' foot-pounds ' has been introduced to express in a convenient way the lifting of one pound to the height of a foot.
Сторінка 265 - Edition, revised. 12mo, cloth 50 Electric Bells, and All About Them. A Practical Book for Practical Men. With more than 100 Illustrations.
Сторінка 15 - ... that the repulsive force at a distance of one-half is four times as great as that at a distance of one, and that the repulsive force at a distance of one-third is nine times as great. In other words, the repulsive force of a magnet is inversely as the square of the distance. Method of Oscillations. — Another method of measuring magnetic force is the method of oscillations. A magnet set to oscillating, when under the influence of a magnetic force, acts like a pendulum when oscillating under...
Сторінка 97 - ... hands of a watch move, while a decrease in the number of lines of force induces a current in the same direction as that in which the hands of a watch move, the line...
Сторінка 212 - C2R, which shows at once that the waste energy increases as the square of the current and the first power of the resistance. In the case of a dynamo transmitting power to an electro-motor which develops a counter EMF = E', the resultant electro-motive force is E — E...
Сторінка 266 - HASKINS, CH The Galvanometer and its Uses. A Manual for Electricians and Students.
Сторінка 54 - Ohm's law the strength of current is proportional to the electro-motive force and inversely proportional to the resistance...
Сторінка 42 - The unit of force is that force which, acting for one second on a mass of one gramme, gives to it a velocity of one centimetre per second.
Сторінка 73 - The herein-described process or method of coating or combining lead or other plates with reduced porous lead, said process consisting in coating the said plates with a suitable compound of lead, and then reducing the latter to the metallic state in the dry way by means of a reducing atmosphere.