BAXTER AND STEWART. — PRASEODYMIUM CHLORIDE. 



191 



material to dissipate electrical charges produced during the transfer- 

 ence of the objects to the balance pans. The weights were standard- 

 ized to hundredths of a milligram by the method described by 

 Richards. 29 Vacuum corrections were applied as follows: 



Results and Discussion. 



In order to show that no considerable error occurred owing either to 

 occlusion by silver chloride or from loss of silver chloride in solution, 

 the ratio between the silver used and the silver chloride obtained has 

 been calculated in the eighteen pairs of analyses for which the data 

 are available. 



Analyses 



3 and 21 



4 and 23 



5 and 24 



6 and 25 



7 and 26 



8 and 28 



9 and 30 



10 and 31 



11 and 33 



12 and 34 



13 and 35 



14 and 36 



15 and 37 



16 and 38 



17 and 40 



18 and 41 



19 and 42 



20 and 43 



Average 



Ag:AgCl 



0.752573 

 0.752711 

 0.752628 

 0.752597 

 0.752723 

 0.752660 

 0.752644 

 0.752671 

 0.752735 

 0.752784 

 0.752716 

 0.752610 

 0.752587 

 0.752647 

 0.752664 

 0.752637 

 0.752685 

 0.752630 



0.752661 



29 Jour. Amer. Chem. Soc, 22, 144 (1900). 



30 Determined at 25° by Mr. C. F. Hawkins, not yet published, 

 found 4.017 at 18°. Compt. rend., 140, 1340 (1905). 



Matignon 



