Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1921 |
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Page 197
... radium , and actinium disclosed the emission of radioactive emanations or gases and their apparently remarkable power of conferring temporary activity on all bodies in their neighborhood . The changes in activity of these substances ...
... radium , and actinium disclosed the emission of radioactive emanations or gases and their apparently remarkable power of conferring temporary activity on all bodies in their neighborhood . The changes in activity of these substances ...
Page 198
... radium emanation — the radioactive gas constantly produced by the trans- formation of radium atoms . The equilibrium volume of this gas from 1 gram of pure radium is only six - tenths of a cubic millimeter , but contributes more than ...
... radium emanation — the radioactive gas constantly produced by the trans- formation of radium atoms . The equilibrium volume of this gas from 1 gram of pure radium is only six - tenths of a cubic millimeter , but contributes more than ...
Page 541
... radium disintegrates spontaneously and that the emanation and helium are the products of this disintegration ? Who doubts that there is a complete genealogy of radium , going from uranium to lead , and that the differences in mass are ...
... radium disintegrates spontaneously and that the emanation and helium are the products of this disintegration ? Who doubts that there is a complete genealogy of radium , going from uranium to lead , and that the differences in mass are ...
Contents
Bureau of American Ethnology | 17 |
Report on the United States National Museum | 25 |
EXECUTIVE COMMITTEE AND REGENTS | 100 |
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