268 STRONTIUM. 



The limit is almost o.i for the best determinations. 

 0.60 185, Sn CU : 4 Ag, Dumas, 1859, R 17. Mean 22 high. 

 0.26 941, Sn : Sn Br4 : 



Bongartz and Classen, 1888. " 182 high. 

 0.28 851, Sn : Kaa Clo Sn: 



Bongartz and Classen, 1888. " 189 high. 

 0.32 153, Sn : Am 2 Cle Sn : 



Bongartz and Classen, 1888. " 216 high. 



The last need no consideration ; we have always found 

 Classen's work queer. See Bongartz under Sb. 



8r = 88? STRONTIUM. 



6 H2 O : Sr Clz, 6 Hz O 108 : 2671=0.40 449. Chg. 15 low. 



Marignac, 1858, 6 Det. Mean 124 high. 



Sr O* S : Sr Cl = 184 : 159=1.15 723. Chg. 10 low. 



Marignac, 1858, 3 Det., 949 927; 22. Mean 213 high. 

 These are the only dry way, gravimetric determinations 

 available. 



Wet Way, silver process, in short form : 

 0.73 6n Sr Cla : 2 Ag, Pelouze, 1845: 



2 Det., R 15. Mean 133 low. 

 Change 46 high. Dumas, 1859: 



A 4, Det., 34. " 241 low. 



B 3, Det., 61. " 201 low. 



C 4, Det., 192. " 156 low. 

 1.14 815, Sr Bra : 2 Ag, Richards, 1894: 



1 4, Det., 12. " 132 low. 



Change 46 high. II 4, Det., n. t( 125 low. 



Ill 4, Det., 5. " 121 low. 

 0.65 958, Sr Br2 : 2 Ag Br, Richards, 1894: 



1 3, Det., 3. " 76 low. 



Change 27 high. II 4, Det., 6, " 77 low. 



This is a most instructive table. We know the chloride 

 process is worse than the bromide process. 



Disregarding the very variable results of Dumas on the 

 chloride, we may say that Sr = 87.73 according to Richards. 



