Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 650
Magnetization by Lodestone. to project into the field of the lantern without showing thewire. Under the lodestone is placed a small cup filled withfine iron filings, and also in the field of the lantern. An un- FiG. 604. … Effect of a Helix on Suspended Particles of Iron. magnetized needle is dipped in the filings and removed,showing that it has no power to Hft the filings ; then whileit is still in the field of the lantern, the needle is rubbed 628 EXPERIMENTAL SCIENCE. across the end of the lodestone and dipped the…
Physics · Lantern projection · Electric apparatus and appliances
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