TIN. 405 



been able to verify this opinion by direct analy- 

 sis. I made three experiments upon fuming li- 

 quor of Libavius, prepared very carefully in my 

 laboratory. The quantity of chlorine found in 

 each did not exactly correspond ; but the mean 

 of all the three gave for the constituents of the 

 chloride 



1 atom tin . . 7'25 

 2 J atoms chlorine 9*112 



16-362 



The analysis of this compound by Dr. John 

 Davy* gave very nearly the same result ; or, 

 rather, he found a somewhat greater proportion 

 of chlorine, viz. 9*18 parts united to 7*%5 of tin. 

 It would seem from these analyses, that fuming 

 liquor of Libavius, when prepared by means of 

 amalgam of tin and corrosive sublimate, is apt to 

 contain an excess of chlorine. 



I find that permuriate of tin in crystals is 

 composed of 



1 atom peroxide of tin . 9-25 



2 atoms muriatic acid . 9-25 



3 atoms water . . 3-375 



21-875 



When this salt is mixed with sulphuric acid, and 



* Phil, Trans. 1812, p. 177. 

 Cc3 



