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An improved method for the determination of the radium content of rocks


McMillan, Edwin Mattison (1929) An improved method for the determination of the radium content of rocks. Master's thesis, California Institute of Technology.


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.

Item Type:Thesis (Master's thesis)
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Unknown, Unknown
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1929
Record Number:CaltechETD:etd-06032004-150356
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2420
Deposited By: Imported from ETD-db
Deposited On:04 Jun 2004
Last Modified:26 Dec 2012 02:51

Thesis Files

PDF (Mcmillan_em_1929.pdf) - Final Version
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