REFERENCES
1.
2.
Failla, U.S. Pat. 1,553,794 (1925).
3.
4.
5.
6.
(a) Ramsay and Soddy, reference one.
Ramsay
and Cameron
, Trans. Chem. Soc.
91
, 1266
(1907
).7.
Chemical Effects of Alpha‐Particles and Electrons, pp. 90–91, Am. Chem. Soc. Monograph (1928).
8.
1928 to 1931.
9.
10.
Compare the procedure of Lind, reference seven.
11.
Duane (reference 5) attributes the excess of hydrogen to the formation of hydrogen peroxide in the radium salt solution. However, this explanation is extremely improbable, since the excess of hydrogen appears undiminished after years of use of such a solution. A probable explanation of this phenomenon is that oxygen (in the presence of radon) is used up by the oxidation of mercury in the tubes connecting bulbs A and B. I am indebted to Dr. Lind for the suggestion that the gas reacting with mercury is more probably chlorine, formed by the radiochemical decomposition of hydrochloric acid.
12.
Compare Gray and Ramsay, reference 6a.
13.
14.
If this were done, either the copper oxide tube should be operated at a temperature above 380 °C, which is maintained in the present system, or else one of the methods of heating the catalyst directly (see
Chem. News
124
, 37
(1922
)) should be adopted. Under present conditions, the rate of removal of the gas is apparently independent of its pressure. While a rate of 2 mm a minute is quite satisfactory when the initial pressure is less than 5 mm, as after the explosion, it is much too slow when the initial pressure is 30 to 60 cm, as it is when the gas is forced into the purifying train without having been exploded.15.
This may be due to a radiochemical reaction.
16.
17.
Compare, however, Wertenstein, reference 9.
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© 1933 American Institute of Physics.
1933
American Institute of Physics
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