TIN. 201 



Herzelius 127.200, rb .041 



Mulder and Vlaandereii 127.517, zb .029 



Dumas 127. 105, zfc .024 



Vlaanderen 127.082, it .012 



Van der Plaats 127. 102, ± .0033 



Bongartz and Classen 126.877, =b .0080 



General mean 127.076, d= .0026 



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

 experiments with stannic chloride, SnCl^. 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^ named in the 

 third column : 



1.839 gim. SnCl^ ^ 3.054 grm. Ag. 60.216 



2.665 " 4-427 " 60.199 



Mean, 60.207, ± -O^^ 



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 electrolj'tically. The data given 

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



Tin Tetrabromide. 



SnBr^ Taken. Sn Found. Per cenf. Sn. 



8.5781 2.3270 27.127 



9.5850 2.6000 27.126 



9.9889 2.7115 27.145 



10.4914 2.8445 27.113 



16.S620 4-5735 27.123 



16.6752 4.5236 27.119 



II. 1086 3-0'25 27.116 



10.6356 2.8840 27.113 



1 1. 0871 3.0060 27.123 



19.5167 5-2935 27.128 



Mean, 27.123, =b .0020 



Potassium Stannichloride. 



KoSiiCl^. Sn Found. Per cent. Sn. 



2.5718 .7472 29.054 



2.2464 .6524 29.042 



9.3353 2.7100 29.030 



12.1525 3.5285 29.035 



12.4223 3.6070 29.036 



15.0870 4.3812 29.040 



10.4465 3-0330 29.034 



18.9377 5-5029 29.058 



18.4743 5-3630 29.029 



17.6432 5- 1244 29.045 



Mean, 29.040, d= .0021 



