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Type of Document	Master's Thesis
Author	McMillan, Edwin Mattison
URN	etd-06032004-150356
Persistent URL	http://resolver.caltech.edu/CaltechETD:etd-06032004-150356
Title	An improved method for the determination of the radium content of rocks
Degree	Master of Science
Option	Physics
Advisory Committee	Advisor Name Title Unknown Committee Member
Keywords	none
Date of Defense	1929-01-01
Availability	unrestricted
Abstract A modified form, developed in this laboratory, of the furnace method for separating radium emanation from rocks originally devised by J. Joly, is described. In the new method the rock is heated with a flux in a nickel crucible by means of a gas flame, the carbon dioxide produced is removed by a sodium hydroxide solution, and the emanation is introduced into an electroscope. The procedure is simpler than that of Joly and gives better results. Results of tests of this method and of Joly's method are given. Some results of tests determinations of the radium content of various rocks are given. Suggestions for further improvement of the method are presented.
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