Comparison of some standards of radioactivity
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Investigators on the continent of Europe have used the C.G.S. electrostatic standard, while those in England and this country have generally used the Boltwood radium emanation standard. Now McCoy and Ashman have already determined the relation between their standard, the Boltwood uranium oxide standard, and the C.G.S. electrostatic standard. I have calculated the theoretical relation which should exist between the Boltwood radium emanation standard and the C.G.S. electrostatic standard. Since these last named standards have been used so extensively in the investigation of the radioactivity of gases, waters, rocks, and other common materials I have attempted to investigate the various methods of removing the radium emanation from solution, and to study the relation between these two standards experimentally, using various forms of electroscopes.
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