Trebel, George. [from old catalog] · New York, F. Tousey · leaf 39
again by the force of gravity, and closes the circuit again; andthus constant vibratory motion is produced in the coil. USE ELECTRICITY. 33 Prepare the following apparatus as represented in Figure 5.Through a cork A, 4 inches in diameter and 3 inches thick, cuta circular hole and insert a…
Electricity
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