Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 660
s placed abox well filled with iron filings. The box and the wire areprojected on the screen, an erecting prism being used. Thewire is pressed downward into the filings and withdrawnbefore the current passes, to show that the wire, uninfluencedby the current, is not able to lift the filings. The… … Magnetization by Means of Spirals. which tends to place itself at right angles to the current.When the current is interrupted, the filings fall. In Fig. 614 is represented a device for showing the mag-netizing effect of a helix, also the different results secured byhehces wound in opposite…
Physics · Lantern projection · Electric apparatus and appliances
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