contained in Coal-gas Naphtha* 1 95 



ture it is decomposed, eliminating first cyanol in vapour, then 

 sulphurous acid; a bulky, difficultly combustible charcoal re- 

 maining behind. 



I have determined the quantity of sulphuric acid only in 

 this salt, because the sulphate of benzidam had been previ- 

 ously analysed by Zinin. 



Analysis: 0*994 grm. of sulphate of cyanol, dried at 212° 

 and precipitated by chloride of barium, gave 0*832 grm. of 

 sulphate of barytes. 



This, when represented centesimalJy, gives 28*672 sulphuric 

 acid; Zinin found 28*99; the formula S0 3 +C, 2 H 7 N + HO 

 corresponds with 28*024 per cent, of sulphuric acid. 



Oxalate of Cyanol. — This salt is easily prepared by adding 

 oxalic acid to a spirituous solution of cyanol. The crystalline 

 mass, washed and dissolved in a very small quantity of boil- 

 ing water, separates on cooling in shining, stellate, oblique 

 rhombic prisms. These crystals are insoluble in aether, spa- 

 ringly soluble in absolute alcohol, but copiously in water. 

 The solution reddens litmus, and when exposed to the air be- 

 comes quickly coloured, depositing a brownish-red powder. 

 The oxalate of cyanol cannot be dried at 212°, because at 

 this temperature it becomes yellow and evolves cyanol. When 

 dried for eight days in the water-bath, the weight did not re- 

 main constant, and the analyses which I performed at different 

 periods gave me such different results that I could not reduce 

 them to simple proportions. I therefore burnt the salt dried 

 in the air and obtained the following results: — 



0*5956 gvm. of oxalate of cyanol gave 1*3266 grm. of car- 

 bonic acid and 0*324 of water. 



These numbers, stated centesimal ly, agree with Fritzsche's 

 analysis of the oxalate of aniline. 



Cyanol salt. Aniline salt. 



Carbon . . . 61*251 61*33 



Hydrogen . . 6*044 5*77 



From the above is deduced the formula C 2 O s + C 12 H 7 N 

 + HO, which gives 61*074 per cent, carbon and 5*741 water. 



Nitrate of Cyanol. — When a mixture of dilute nitric acid 

 and cyanol is allowed to stand for some time, this salt is de- 

 posited in compact concentric needles, which can be obtained 

 pure and dry by pressing them between folds of bibulous 

 paper. The mother liquor is of a red colour; and the sides 

 of the basin containing it present a blue efflorescence, so that 

 the whole might be mistaken for solution of cobalt. The cry- 

 stals, when cautiously heated, melt, and evaporate into a co- 

 lourless vapour, which condenses in flowery crystals upon the 

 sides of the vessel. A small portion of the nitrate of cyanol is 



02 



