The outlines of physics: an elementary text-book (1897)
Nichols, E. L. (Edward Leamington), 1854-1937 · New York, The Macmillan Company; London, Macmillan & Co., Ltd. · leaf 44
500 cm. above the floor,viz. in the edge of a small bracket attached to the wall or to a suita-ble support (Fig. 21). (2) An electromagnet; also a key and battery and conductingwires. A flexible, double lamp cord is to be preferred. The sameshould be about 600 cm. in length. (3) A strong cord… … FiQ. 21. so THE OUTLINES OF PHYSICS (4) The metronome described in Art. 6. (5) A cast-iron weight. (An iron disk weighing 100 g. is suita-ble. It should have one face covered with paper to avoid its cling-ing to the magnet poles when the circuit is open.) Procedure: (a) The battery is connected in…
Physics
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