Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 653
Magnetic Field. fine iron filings. In the top of the cell are inserted two softiron pole pieces, arranged to receive the poles of a perma-nent magnet. The glycerine is thoroughly agitated, so as to Fir,. 60S. … Projection of Electric Spark. distribute the filings as evenly as possible throughout thecell. The cell is then placed in the lantern, and the magnetapplied to the pole pieces. The iron particles will be drawn LANTERN PROJECTION. 631 slowly toward the pole pieces, arranging themselves in sym-metric…
Physics · Lantern projection · Electric apparatus and appliances
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