48 



Transactions. 



In addition to these compounds the lower members of the 

 naphthylamides have also been prepared. In each case the 

 melting-points form an even less regular series than do the 

 aniiides and paratoluidides. 



These series scarcely show any regularity even when the 

 odd and even members are considered separately. But it is 

 noticeable that when the melting-point of the a compound 

 rises, that of the ft derivative falls, and vice versa. Con- 

 sequently, on adding the two series together it might be 

 expected that regularities would appear. Such is indeed the 

 case ; the sum of the melting-points of the even as well as 

 the odd members forms a gradually diminishing series of 

 numbers. 



The naphthylamides, even when recrystallized several 

 times from alcohol, are of a pink or yellowish hue. But 

 the most noticeable feature is that the odd members of the 

 a compounds are much darker in colour than the even mem- 

 bers, whilst in the case of the (3 derivatives exactly the reverse 

 is found to be the case. 



Experimental. 



The aniiides and toluidides described in the present paper 

 were prepared by the following method : A mixture of from 

 1 to 3 grams of the fatty acid and the equivalent amount of 

 aniline or paratoluidine was sealed in a tube and heated to 

 150°-180° for eight hours. In no case was any pressure ob- 

 served in the tube after cooling. The product obtained in 

 this manner was treated several times with dilute hydro- 



