Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 235
This statement isknown as the doctrine of correlation of energy. When oneform of energy disappears an exact equivalent of anotherform takes its place, so that the sum total of the energy isnot changed. This is known as the doctrine of conservationof energy. These two principles constitute the… … o PADDLE Fig. 200.—Dr. Joules Paddle Wheel Experiment. In an experiment he caused a paddle-wheel to revolve in avessel filled with water, by means of a falling weight at-tached to a cord and wound around the axle of the wheel.Fig. 200. The resistance offered by the water to the motionof the paddles…
Electricity · Magnetism
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