618 



solving the pure base in dilute sulphuric acid. It forms white 

 scales, which are apt to be decomposed by recrystallization from pure 

 water. The salt dried in vacua over sulphuric acid contains 

 2(C 20 H 8 N 2 2 ), H 2 S 2 8 . 



Hydrochlorate of ninaphtylamine forms acicular crystals ; they 

 are obtained like the sulphate, which they resemble in their general 

 deportment. Composition : 



C 20 H 8 N 2 2 ,HC1, 



The platinum-salt of ninaphtylamine forms rather soluble yel- 

 lowish-brown crystals, which are obtained by adding a concentrated 

 solution of dichloride of platinum to an alcoholic or ethereal solution 

 of the base. It has the usual constitution, containing 

 C 20 H 8 N 2 2 ,HCl,PtCl 2 . 



If it be permitted, in the absence of further experimental evidence, 

 to speculate upon the molecular constitution of the body which forms 

 the subject of this note, the simplest interpretation of its composition 

 andYormation would be to view it as a substitution-product of uaph- 

 tylamine, but differing from the ordinary nitro-substitutes, by con- 

 taining the elements of binoxide, instead of tetroxide of nitrogen. 



P TT 



Naphthylamine . . C 20 EL N = 2 H* N, 



C 20 (H 6 N0 2 ) 

 Ninaphthylamine. . C 20 H 8 N a O 2 = H \ N. 



Its formation would then be represented by the equation 



C 20 [H 6 (N0 4 ) 2 ]+4 H 2 S 2 =3 H 2 2 + 8S + C 20 [H 8 N0 2 ]N 



Dinitronaphtalin. Ninaphthylamine. 



Bodies in which binoxide of nitrogen figures as a material of sub- 

 stitution are as yet extremely rare, whilst nitro-substitutes containing 

 the elements of hyponitric acid are of the most general occurrence. 



Some chemists have considered nitrous ether as a binoxide of 

 nitrogen derivative of alcohol. 



Alcohol C 4 H 6 O 2 , 



Nitrous ether .' C 4 ffy )O 2 . 



The most interesting illustrations of this kind of substitution, how- 



