Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 593
the discharge from thenegative terminal of the coil, while the marks shown in Fig.552 were made by the discharge from the positive terminal.The sagittate forms of the larger marks in Fig. 550are produced b^- a heavier discharge. The sagittate andbird-like forms shown in Fig. 551 are of rare… … Autograph of the Electric Spark. but the} are of substantiall}- the same nature as thoseshown in Fig. 550. Figures resembling these have beenseen in vacuum tubes, and sketched by De la Rue. Re-productions of some of his drawings are given in Fig. 553:I in this cut shows striee in which each section…
Physics · Lantern projection · Electric apparatus and appliances
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