Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 379
er magnet be a strongone. Iron filings or turnings of medium fineness arerequired in this case. When the curves have assumed the desired proportions,a few very fine shreds of paraffine, scraped from a paraffineblock or candle, are deposited very gently on the curves,and melted by holding above them… … Arborescent Magnetic Figures. the filings are now attached may be removed from the mag-net after having applied the armature, if it be a permanentmagnet, or after interrupting the current, if it be an electro-magnet, when the curves will retain their position. The arborescent figures shown in Fig.…
Physics · Lantern projection · Electric apparatus and appliances
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