430 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



counterpoise as nearly as possible like the object weighed, 

 material, shape, and volume. 



both 



in 



series : 



Ag 



Ag 



2 AgRr : Ag,Cr 2 7 



AgBr 



= 0.574453 9 



9 Baxter, These proceedings, 42, 201 (1906). 



10 AgCl. 



11 Calculated from the ratio AgBr: AgCl = 131.0171 : 100.0000. Bax- 

 ter, loc. cit. 4.16076 grams AgCl o 5.45131 grams AgBr. 



