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Scientific American, Vol. 91, No. 25 (1904) (1904)
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ar, the charge gradually diminishes and the leaves activity is so extensive, confusing, and in many cases approach each other. it must acquire an electric charge unless these leave in misleading, that a succinct account of the whole sub- compensating proportions. As a matter of fact the A given… … ceaseless motion. : the Spontan- nium _ = com- part of that of radium which also emits both @ and » Radium and thorium compounds emit ©0us Electri- Fig. 1.—Electroscope for Detecting pounds emit rays, the latter of very small intensity. Thorium, ee cal Dischar- Radio-Activity. also invisible also…Internet Archive · Public domain (published before 1931). Free to use for anything.
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