ATOMIC WEIGHTS 



81 



Rubidium Series. 



Ratio. 



132.842 

 132.858 

 132.851 

 132.849 

 132.826 

 132.847 

 132.832 

 132.865 

 132.856 

 132.836 

 132.855 

 132.846 

 132.842 

 132.862 



Potassium Series. 



Mean, 132.848, ± .0020 



Ratio. 



132.850 

 132.852 

 132.853 

 132.845 



Mean, 132.850, ± .0012 



The analyses of cobalt chloride, by Baxter and Coffin/ furnish the 



subjoined figures : 



Ratio. 



132.846 

 132.884 

 132.857 

 132.865 

 132.872 

 132.859 

 132.877 



Mean, 132.8657, ± .0034 



From the analyses, by Baxter and Hines,^ of manganese chloride we 

 have — 



1 Zeitsch. anorg. Chem., 51, 171. 1906. 

 -Journ. Amer. Chem. Soc, 28, 1560. 1906. 



