Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 589
5 66 EXPERIMENTAL SCIENCE. very slightly with kerosene oil was adopted as the mostpracticable. The glass was prepared for smoking by smear-ing it over with the oil, then removing all but a trace, thensmoking it lightly over a very large gas jet or over acandle. The glass plate thus prepared was… … Marks produced by Lightning. terminals of the induction coil, at right angles to the ter-minals, so that the discharge might be directly against thesmoked surface of the glass, as shown in Fig. 547. The coil emplo3ed was capable of yielding a i^ inchspark, and the pointed terminals were separated ^…
Physics · Lantern projection · Electric apparatus and appliances
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