?.9 



THE ATOMIC WEIGHTS. 



The percentage of oxygen in sodium chlorate has been 

 determined only by Penny,* who used the same method 

 which he applied to the potassium salt. Four experiments 

 gave the following results : 



45.060 



45-075 

 45.080 

 45-067 



Mean, 45.0705, rb .0029 



The ratio between silver and sodium chloride has been 

 fixed by Pelouze, Dumas, and Stas. Pelouzef dissolved a 

 weighed quantity of silver in nitric acid, and then titrated 

 with sodium chloride. Equivalent to 100 parts of silver he 

 found of chloride : 



54-158 

 54-125 



54-139 



Mean, 54.141, zfc .0063 



By Dumas| we have seven experiments, with results as 

 follows : The third column gives the ratio between 100 of 

 silver and NaCl. 



Mean, 54.172, ± .0096 



Stas, 1 1 applying the method used in establishing the sim- 

 ilar ratio for potassium chloride, and working with salt from 



* Phil. Transactions, 1839, p. 25. 

 ■j-Compt. Rend., 20, 1047. 1845. 

 J Ann. Chem. Pharm., 113, 31. 1S60. 

 II Aronstein's Translation, p. 274. 



