Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 378
ion or individualuse, a plate of glass flowed with spirit varnish is laid uponthe magnet, and iron dust reduced from the sulphate, or finefilings, or dust from a lathe or planer, is applied by means ofa small magnet in the manner indicated in Fig. 340. Thesmall magnet in this case consists of two… … Magnetic Curves in Relief. adhering particles are shaken off. The remaining portionis then disengaged from the small magnet by rapping themagnet with a pencil, the small magnet being held abovethe poles of the larger one. The particles having been pol-arized by the small magnet, arrange themselves…
Physics · Lantern projection · Electric apparatus and appliances
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