TIN. 



201 



Berzelius 127.20x3, .041 



Mulder and Vlaanderen 127.517, dr .029 



Dumas 127. 105, .024 



Vlaanderen 127.082, d= .012. 



Van der Plaats 127. 102, .0033 



Bongartz and Classen 126.877, .0080 



General mean , 127.076, dr .0026 



Dumas, in the paper previously quoted, also gives the results of some 

 experiments with stannic chloride, SnCl 4 . This was titrated with a solu- 

 tion containing a known weight of silver. From the weighings given, 

 100 parts of silver correspond to the quantities of SnCl 4 named in the 

 third column : 



1.839 grm. SnC! 4 3.054 grm. Ag. 60.216 



2.665 4.427 " 60.199 



Mean, 60.207, =t '6 



Tin tetrabromide and the stannichlorides of potassium and ammonium 

 were all studied by Bongartz and Classen ; who, in each compound, 

 carefully purified, determined the tin electrolytically. The data given 

 are as follows, the percentage columns being added by myself: 



Taken. 

 8.5781 



9-5850 



9.9889 

 10.4914 

 16.8620 

 16.6752 

 11.1086 

 10.6356 

 11.0871 

 19.5167 



Tin Tetrabromide. 

 Sn Found. 

 2.3270 

 2.6000 

 2.7115 

 2.8445 



4.5735 

 4.5236 



2.8840 

 3.0060 

 5-2935 



Percent. Sn. 



27.127 

 27.126 



27.145 

 27.113 

 27.123 

 27.119 

 27.116 



27.113 

 27.123 

 27.128 



Mean, 27.123, dr .0020 



2.5718 

 2.2464 



9-3353 



12.1525 

 12.4223 

 15.0870 

 10.4465 

 18.9377 

 18.4743 

 17.6432 



Potassium Stannichloride. 



Sn Found. Per cent. Sn. 



.7472 29.054 



.6524 29.042 



2.7100 29.030 

 3-5285 ^ 29.035 



3.6070 29.036 



4.3812 29.040 



3.0330 29.034 



5.5029 29.058 



5.3630 29.029 



5.1244 29.045 



Mean, 29.040, .0021 



