THE ELEMENTS OF THE CHEMIST 



125 



pounds analysed, will probably suffer some slight revision in 

 future years. Lithium, for example, would be a much more 

 difficult case than potassium, and it is still uncertain whether 

 the whole range of rare earth metals, lanthanum, cerium, and 

 the rest, have yet been obtained in the state of purity desirable. 



INTERNATIONAL ATOMIC WEIGHTS FOR 1916 



79-2 

 79-92 

 82-92 

 85-45 

 87-63 

 88-7 

 90-6 

 93-5 

 96-0 

 101-7 

 102-9 

 106-7 

 107-88 

 112-40 

 114-80 

 118-7 

 120-2 

 127-5 

 126-92 

 130-2 

 132-81 

 137-37 

 139-0 

 140-25 

 140-9 

 144-3 

 150-4 

 152-0 

 157-3 

 159-2 

 162-5 

 163-5 

 167-7 



1 Placed out of order for reasons which will appear later. 



