yO ATOMIC WEIGHTS OF SODIUM AND CHLORINE. 



ii. If the atomic weight of silver is assumed to be 107.920, 

 sodium is found from the above results to have an atomic weight of 

 23.006 and chlorine an atomic weight of 35.470. 



12. Many other atomic weights are affected, in their second deci- 

 mal places, by these changes. In particular, certain slight anomalies 

 previously noticed in Harvard work are explained by them, and the 

 atomic weight of nitrogen computed from ammonia is brought nearer 

 to the value required by Avogadro's rule. Other anomalies appear 

 in other places, however, and it is clear that many new atomic-weight 

 investigations must be instituted to explain them, with due attention 

 to hitherto unheeded dangers, especially of occlusion. 



