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PROCEEDINGS OF THE AMERICAN ACADEMY 



Naquet,* who made it as we did, and Neuhof, t who obtained it from 

 the chlorbenzylacetate and alcoholic potassic hydrate, we did not 

 think it worth while to analyze or study it more carefully. 



We have thus brought our revision of the parachlorbenzyl com- 

 pounds to an end ; the only one previously obtained that we have not 

 studied is the amide of the parachloralphatoluylic acid, which we 

 did not succeed in obtaining by the action of potassic cyanide on 

 parachlorbenzylbromide, although Neuhof made it in this way from 

 the chlorbenzylchloride. It is possible, but not very probable, that 

 this difference between his results and ours is due to the fact that he 

 used the chloride while we used the bromide. 



For convenience of comparison, the melting-points of the sub- 

 stances described in this paper, with those given by our predecessors, 

 are collected in the following table, to which is added a comparison 

 between the amounts of water of crystallization in the salts of the 

 parachlorbenzylsulphoacid, in those heretofore described as such, and 

 in the corresponding salts of the benzylsulphoacid.J 



COMPARISON OF MELTING-POINTS. 



* Naquet, Ann. Chem. Pharm., Supp. 2, p. 249. 

 t Neuhof, Ann. Chem. Pharm. 147, p. 339. 

 | Bolder, Zeitschrift der Chemie, 18G8, p. 440. 



