Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 556
t, by the attraction of a piece of iron attached to a spring,which, by moving towards the end of the core, separates from a point inconnection with the battery, and, the current no longer flowing, the mag-netism ceases, and the spring again brings back the iron and renews thecontact. By means of… … Fig. 262).—Discharge through Rarefied Air. place through an exhausted vessel in the manner represented in Fig. 268.A beautiful light fills the interior of the vessel, and the terminals appearto glow with a strange radiance—one being surrounded with a kind of bluehalo and another with a red. On…
Inventions
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