404 ZINC, CADMIUM, LEAD, & C . 



1 atom tin . . 7'25 

 1 atom chlorine . 4-5 



11-75 



This chloride is a grey matter, having a resinous 

 lustre and fracture. When put into chlorine 

 gas, it catches fire, and is converted into per- 

 chloride. 



Fuming H- 4. The perchloride of tin has been long known 

 '" under the name of fuming liquor of Libavius. It 

 may be obtained by mixing together amalgam of 

 tin and corrosive sublimate, and distilling with a 

 very moderate heat. A colourless liquid comes 

 over at first, consisting chiefly of water ; then the 

 fuming liquor rushes all at once with such rapi- 

 dity, that I have more than once lost the whole 

 product of the distillation. Dr. John Davy found 

 that this perchloride may be obtained likewise by 

 mixing together concentrated permuriate of tin 

 and sulphuric acid, and distilling with a gentle 

 heat. 



This perchloride gives out very copious and 

 dense fumes when exposed to the air, in conse- 

 quence of its great avidity for moisture. Adet 

 found, that when three parts of it are mixed with 

 one part of water, the whole condenses into a 

 solid state. I see no reason to doubt that this 

 perchloride, when in a state of purity, is a com- 

 pound of 1 atom tin and 2 atoms chlorine ; and 

 that its atomic weight is 16-&5 ; but I have not 



