Intelligence and Miscellaneous Articles. 419 



prepared, as had been some years since been done by M. Kuhlman, 

 compounds of bichloride of tin with sulphuric aether, alcohol, hydro- 

 chloric aether, and pyroxylic spirit ; and M. Lewy combined it also 

 with oxalic aether, benzoic aether, benzoate of methylene, acetic aether, 

 acetic acid, benzoic acid, oil of bitter almonds, urea, camphor, ethal, 

 &c. The greater part of these compounds formed very fine crystals, 

 but their ready alteration in the air, and even in vacuo, as well as 

 the difficulty of purifying them, have hitherto prevented an exact 

 analysis of them ; M. Lewy therefore endeavoured to verify the opi- 

 nion of M. Kuhlman as to the composition of the compounds which 

 he had formed. 



Compound of Perchloride of Tin and Sulphuric Mther. — This forms 

 crystals of very great beauty ; it is obtained, as shown by M. Kuhl- 

 man, by mixing the two bodies either in the state of liquids or va- 

 pours. The crystals have the form of rhomboidal tables of a bril- 

 liant aspect and perfect formation. They are volatile without de- 

 composition, dissolve readily in excess of aether, and decompose in 

 contact with the air. This compound appeared to be formed of — 



Equivalents. 



Chlorine 34-77 CI 2 



Tin 28-88 Sn 



Carbon 23-57 C 3 



Hydrogen 4-91 H 10 



Oxygen 7'86 O 



99-99 

 Compound of Perchloride of Tin and Anhydrous Alcohol. — This was 

 formed by merely mixing the two liquids. During mixture, the tem- 

 perature of the substances was always kept below 32° Fahr. ; when 

 the combination has taken place, it is to be exposed in vacuo to sul- 

 phuric acid and potash. After some days the compound appears in 

 the form of small prismatic crystals, which readily dissolve in an 

 excess of alcohol, so that it is easy to re-crystallize them. The cry- 

 stals must not, however, be kept too long in vacuo, as they then 

 alter readily. This compound gave, by corrected analysis, — 



Equivalents. 



Chlorine 32-74 CI* 



Tin 36-32 Sn 2 



Carbon 14'82 C 8 



Hydrogen 3-71 H 12 



Oxygen 1236 O 5 



99-95 



Compound of Perchloride of Tin with Oxalic jEther. — This is pre- 

 pared in the same manner as the preceding. When small quantities 

 of perchloride of tin are added to oxalic aether, a moment arrives at 

 which a crystalline mass is formed, consisting of small needles 

 grouped round a common centre. These crystals alter readily, and 

 it is best to analyse them as soon as formed. When mixed with 

 water, oxalic aether is reproduced. 



