Combinations of different Metals and Chlorine. ijg 
As therefore 67.5 grains of stannane contain 42 grains of 
tin, 100 appear to consist of 
62.22 tin 
37.78 chlorine 
100.00 
As stannanea is extremely volatile, it is difficult to weigh it, 
with perfect accuracy. The mode I adopted, was to pour it 
into a bottle half full of water, the weight of which was pre- 
viously ascertained, and to infer the quantity added by the in- 
crease of weight. 
81.75 grains of stannanea thus weighed in water,* afforded 
when decomposed by zinc 34 grains of tin. 
Hence 100 of stannanea appear to be composed of 
42.1 tin 
57.9 chlorine 
100.0 
I am not acquainted with any analytical method for directly 
ascertaining the proportion of chlorine in either of the two 
preceding combinations. Nitrat of silver, when immediately 
applied, will not answer the purpose, because the oxide of 
silver is partially reduced by the solution of stannane ; and 
an oxide of tin is thrown down in mixture with the horn silver 
from the liquor of Libavius. 
* A little muriatic acid was added before the zinc was introduced, to dissolve the 
oxide of zinc, which, in other similar experiments, I observed was rapidly formed, and 
which, from the large quantity of hydrogene evolved, appeared to be owing to the 
decomposition of water, chiefly in consequence of the Galvanic effect of the contact 
of the two different metals, zinc and tin. 
A a 2 
