88 SCIENCE PROGRESS 



Curie, Atomic Weight of Radium, Le Radium, 1907, Oct. 



Thorpe, The Atomic Weight of Radium, Proc. Roy. Soc. 1908, 80, 298. 



Kolowrat, Evolution of the Emanation from Radium Salts at Different Tem- 

 peratures, Compt. Rend. 1907, 145, 425. 



Henriot, Condensation of the Radioactive Emanations, Le Radium, 1908, Feb. 



Kofler, The Absorption Coefficient of Radium Emanation, Physik. Zeitschr. 1907, 

 9,6. 



Jorissen and Ringer, The Chemical Actions of Radium Rays, Berichte, 1906, 

 39, 2093. 



Creighton and Mackenzie, The Influences of Radium on the Decomposition of 

 Hydriodic Acid, Amer. Chem.J. 1908, 39, 474. 



Rumelin, The Rate of Transformation of the Radium Emanation, Phil. Mag. 

 1907, vi. 14, 550. 



Ramsay and Soddy, The Production of Helium from Radium, Proc. Roy. Soc. 

 1904, 73, 346. 



Ramsay and Collie, The Spectrum of Radium Emanation, ibid. p. 470. 



Ramsay, The Chemical Action of Radium Emanation, Part I.,/. Chem. Soc. 1907 



91,931- 

 Ramsay and Cameron, Do., Part III. ibid. 1908, 93. 



Some Properties of Radium Emanation, ibid. 1907, 91, 1266. 



