Radium and Other Radio-active Elements

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P. Marshall & Company, 1904 - Radioactivity - 105 pages
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Page 42 - ... 1. Permanent-magnet type can be used for DC only. 2. Dynamometer type can be used both for AC and DC 5.1. Permanent-magnet Moving-Coil Type (PMMC) Instruments A permanent-magnet moving coil-type instrument works on the principle that "when a current-carrying conductor is placed in a magnetic field, it is acted upon by a force which tends to move it to one side and out of the field".
Page 68 - The characteristic property of excited radio-activity is that it can be confined to the kathode in a strong electric field. It is probable, therefore, that the radio-activity is due to the transport, in the electric field, of positively charged carriers of some kind. The experiments...
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Page 26 - NYVanNosWe have endeavored to treat the subject in an experimental and practical way, but have not attempted to relate or explain the various theories of the radiations. (Introd.) 530 Radium || Radioactivity Lodge, Richard Walley, 1857- Notes on assaying metallurgical laboratory experiments.
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