Intelligence and Miscellaneous Articles. 4 1 7 



with basic chlorides and organic matters have not hitherto attracted 

 much attention. 



Compounds with Water.— \t is well known that when a small quan- 

 tity of water is added to perchloride of tin, the whole becomes a 

 crystalline mass ; on adding more water, the hydrate thus formed 

 dissolves, and yields fresh crystals by slow evaporation ; the form of 

 these could not be ascertained on account of their extreme deliques- 

 cence. Their formula appeared to be SnCl 2 + 5HO, or to consist of — 



Chlorine 40'55 



Tin 33-68 



Water 25-77 



100-00 



When these crystals are exposed in vacuo over sulphuric acid, 

 they lose a certain quantity of water of crystallization, and eventually 

 a hydrate remains containing only two equivalents of water. 



Compounds with the Chlorides. — It is well known that perchloride 

 of tin possesses properties analogous to those of acids ; it combines 

 with basic chlorides to form double chlorides, the greater part of 

 which crystallize very readily ; they all contain equal equivalents of 

 perchloride of tin and basic chlorides. 



The compounds formed with chloride of potassium and chloride of 

 ammonium are anhydrous. The former contains — 



By analysis. By calculation. Equivalents. 



Chlorine 5204 52-01 CI 3 



Tin 28-50 28'79 Sn 



Potassium .. 18-76 1919 K 



99-30 99-99 



Chloride of Tin and Ammonium. — This salt consists of — 



By analysis. By calculation. Equivalents. 



Chlorine 57-33 * 58-03 Cl s 



Nitrogen 7"70 7'65 N 



Hydrogen .. 7 '70 2-19 H 4 



Tin 32-30 32-13 Sn 



10000 



The compounds which perchloride of tin forms with the chlorides 

 of sodium, strontium, magnesium, calcium, and barium, all contain 

 water of crystallization ; and as far as the author's experiments have 

 yet been carried, these double salts all contain five equivalents of 

 water. 



Double chloride of Sodium and Tin, when the analysis is corrected 

 by calculation, appears to consist of — 



Equivalents. 



Chlorine 45-54 CI 3 



Sodium 9-94 Na 



Tin 25-21 Sn 



Water 19-30 Aq s 



99-99 



