An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 616
sensitiveness. One means, in-vented by Branly and used byMarconi in his first wirelesstelegraphs, is called a coherer.It consists of a small glass tubeclosed at each end by metal . , /T^. , ~ ~N A c Fig. 400. — Coherer, an early form pistons (Fig. 400). A space of of wave detector. a millimeter or… … 550 ELECTRICITY AND MAGNETISM
Electricity · Magnetism
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