OF ARTS AND SCIENCES. 313 



while at present to follow the investigation of such an unstable sub- 

 stance farther. 



The Chloride, C G H 4 C1CH 2 S0 2 C1, was made by grinding the dry 

 sodium salt with phosphoric pentachloride, and afterward warming 

 the mixture gently in a porcelain dish on the sand-bath ; the oily 

 mass thus obtained gave with water the chloride as a heavy oil, which 

 soon solidified, and was purified by crystallization from ether. 



0.1410 gr. of substance gave by the method of Carius 0.1768 gr. 

 of AgCl and 0.1470 gr. of BaS0 4 . 



It forms white flattened crystals, often arranged in indistinct pen- 

 nate groups, and having an aromatic odor; melting-point 85^° ; it is 

 insoluble in water, soluble in ether and alcohol, but seems to be 

 decomposed by the latter. 



Parachlorbenzylsulphide, (C 6 H 4 C1CH 2 ) 2 S. 



Pauly * described this substance, which he obtained from chlorben- 

 zylchloride (or bromide), by the action of an alcoholic solution of 

 potassic sulphide, as a thick brown oil, with an unpleasant odor; and 

 adds, that it did not solidify even after standing several days. 



On warming an alcoholic solution of parachlorbenzylbromide with 

 sodic sulphide (prepared by saturating one half of an alcoholic solu- 

 tion of NaOH with H 2 S, and then adding the other half) we obtained 

 by precipitation of the product with water a heavy oil, which we dis- 

 solved in hot alcohol ; on cooling this saturated solution a purer oil 

 separated, that solidified on standing over night, and was then purified 

 by recrystallization from hot alcohol. 



0.2760 gr. of the substance dried in vacuo gave on combustion 

 0.5970 gr. of Co 2 and 0.1110 gr. of H 2 0. 



Carbon 

 Hydrogen 



It forms thick white needles, often seven centimeters long, with 

 very little odor ; from a hot alcoholic solution, it is sometimes depos- 



* Pauly, Ann. Chem. Pharm. 167, p. 187. 



