44 THE ATOMIC WEIGHTS. 



usual method of working was followed; namely, nearly 

 equivalent quantities of the two salts were weighed out, the 

 solutions mixed, and the slight excess of one estimated by 

 titration. In four experiments 100 parts of silver nitrate 

 were found equivalent to chloride of ammonium as follows : 



31.489 

 31-490 

 31-487 

 31.486 



Mean, 31.488, i .0006 



The similar ratio between potassium chloride and silver 

 nitrate has been determined by both Marignac aiid Stas. 



Marignac* gives the following weights. I add the quan- 

 tity of KCl proportional to 100 parts of AgNOg : 



.0044 



Stas't results are given in three series, representing silver 

 nitrate from three different sources. In the third series the 

 nitrate was weighed in vacuo, while for the other series this 

 correction was applied in the usual way. For the KCl 

 equivalent to 100 parts of AgNOg Stas found : 



First Series. 

 43-878 

 43-875 

 43-875 

 43-874 



Mean, 43-8755. ± -0005 



* Berzelius' Lehrbuch, 5th Ed., 3d vol.. 1184, 1185. 

 t Aronstein's Translation, p. 308. 



