The London, Edinburgh and Dublin philosophical magazine and journal of science . nequilibrium is 1 : 45 : 639 for the soft rays from radium B,the hard rays from radium B, and the rays from radium C. In conclusion, I wish to express my warmest thanks toSir Ernest Rutherford for suggesting this research, and forhis kind advice and help during its progress. University of Manchester,July 19] 4. LV1. The Distribution of the Active Deposit of Radium inElectric Fields*. By H. P. Walmsley, IT has long been known that the active deposits from theemanations of thorium and radium are concentrated o
The London, Edinburgh and Dublin philosophical magazine and journal of science . nequilibrium is 1 : 45 : 639 for the soft rays from radium B,the hard rays from radium B, and the rays from radium C. In conclusion, I wish to express my warmest thanks toSir Ernest Rutherford for suggesting this research, and forhis kind advice and help during its progress. University of Manchester,July 19] 4. LV1. The Distribution of the Active Deposit of Radium inElectric Fields*. By H. P. Walmsley, IT has long been known that the active deposits from theemanations of thorium and radium are concentrated onthe cathode in a strong electric field, but that in the case ofradium there always appeared from 5 to 10 per cent, onthe anode. In the case of actinium it has been shownthat under suitable conditions practically the whole of theactive deposit is also concentrated on the cathode. Recentdetailed work by Wellisch and Bronson f has confirmed theview that the case of radium is anomalous. The present in-vestigation was undertaken to obtain more information onthis anomaly. Fiff. The apparatus consisted of two similar cylindrical brasschambers A and B (tig. 1), connected together by a metalT-piece which fitted into ebonite stoppers closing one end of * Communicated bv Sir Ernest Rutherford, t Wellisch & Bronson, Phil. May. xxiii. p. 714 (1912). 510 Mr. H. P. Walmsley on the Distribution of the each. A glass bulb containing tightly-packed cotton-woolconnected the T-piece to a reservoir in which radium emana-tion, mixed with air, was stored over mercury. The otherends of the cylinders were closed by ebonite stoppers throughwhich passed short brass rods. The electrodes were madeso that they could be slipped into small holes bored in theserods. It was found that the apparatus could be made quiteair-tight by attaching a rubber ring to the ebonite stoppersand employing a little stopcock grease. The chambers wereinsulated on supports of paraffin wax. To produce the electric field,
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