STRONTIUM. 65 



Series B. 



3.356 grni. SrClg = 4-574 grm. Ag. Ratio, T^.-yi^l 



6.3645 " 8.667 " 73-4327 



7.131 " 9.712 " 73-4246 



Mean, 73.4095, ± .0130 



Series C. 



7.213 grm. SrClj = 9. 811 gnn. Ag. Ratio, 73.5195 



2.206 " 3.006 " 73-3866 



4.268 " 5-8i6 " 73-5529 



4.018 " 5.477 " 73-3613 



Mean, 73-4551. ± -0321 



Combining, we have : 



Pelouze 73.4781. d= .0050 



Dumas, A 73-3595- ± -0303 



B 73-4095. ± -0130 



c 73-4551. ± -0321 



General mean 73-4655, ± .0046 -' 



The foregoing figures apply to anhydrou.s strontium chlo- 

 ride. The ratio between silver and the crystallized salt, 

 SrCla-BHjO, has also been determined in two series of ex- 

 periments by Marignac* Five grammes of salt were used 

 in each estimation, and, in the second series, the percentage 

 of water was first determined. The cjuantities of the salt 

 corresponding to 100 parts of silver are given in the last 

 column : 



Series A. 



5 grm. .SrCl2.6H20 = 4.0515 grm. Ag. 123.4" 



4.0495 " 123.472 



4.0505 " 123.442 



Mean, 123.442, ± .012 



Series B. 



5 grm. SrClj.eHgO = 4.0490 grm. Ag. 123.487 



4.0500 " 123.457 



4.0490 " 123.487 



Mean, 123.477, ± .007 

 General mean of both series, 123.470, ±z .006 



* Journ, Prakt. Chem., 74, 216. 1858. 



