appendix. 



Supplementary to Table 532, page 410. 

 ISOTOPES. 



(See J. Am. Ch. Soc. 45, p. 869, 1923.) 



445 



Observers: A = Aston, D = Dempster, T = Thompson (G. P.) 



The masses are given in the order of the intensity of the mass spectrum bands. Table published 

 by the International Committee on Chemical elements. The Phil. Mag. 45, 1923, gives also Sb, 

 2 isotopes, 121, 123. 



Smithsonian Tables. 



