Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 570
ed lines characteristic of the substance struck. This is especially so in the case of the rare earths, and ^ a very sensitive method for their detection has been founded by Crookes upon this property. If objects be interposed in the paths of the stream, a sharpshadow is cast on the walls of the…
Electricity · Magnetism
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