contained in Coal-gas Najrtitha. 121 



comparably greater quantity of cyanol. Generally leucol pre- 

 dominated in the oils which I investigated ; its quantity may 

 amount to double that of the cyanol obtained. My method 

 of separation will yield the bases in a state of purity, but it has 

 this fault, that a considerable quantity of oil, which distils over 

 between the first and last portions, cannot be resolved into 

 cyanol and leucol. A more minute examination of the salts 

 showed that a further separation might be effected by a sim- 

 pler process. I shall again refer to this subject. 



I may here observe that my analyses were made in the la- 

 boratory of Professor Liebig, to whom I am indebted for many 

 valuable suggestions in pursuing this investigation. 



1. Cyanol. 



Composition. — I shall first treat of cyanol, because the in- 

 vestigation of its composition and relations guided my subse- 

 quent inquiries. The preparation of this base for analysis has 

 been already described. 



I. 0*4631 grm. of cyanol gave 1*302 of carbonic acid and 

 0-3185 of water. 



II. 0-2807 grm. of cyanol gave 0*789 of carbonic acid and 

 0*197 of water. 



Assuming that there was no oxygen present, as there is none 

 in nicotine, coniine, chinoline or sinnamine, an assumption 

 which it will be seen in the sequel was warranted, I neglected 

 in these analyses to determine the nitrogen. 



The per-centage of the elements was as follows : — 



I. II. 



Carbon . . . 77*316 77*298 



Hydrogen . . 7*6*2 7*798 



Nitrogen . . . 15*042 14*904 



100*000 100*000 



These numbers correspond with the formula C 12 H 7 N, the 

 calculated values of which agree very closely with the mean 

 of my analyses. 



Composition per cent. 

 Theory. Mean. 



12 atoms of Carbon* . 910*248 77*491 77*307 

 7 ... Hydrogen 87*36 7*437 7*720 



1 ... Nitrogen. 1 77*04 15*072 14*973 



1174*648 100*000 100*000 

 In order to control the given formula, the double salt of 

 hydrochlorate of cyanol and chloride of platinum was pre- 

 pared and its amount of platinum determined. The salt which 

 served for the analyses was in beautiful crystals, and had been 

 * Equivalent of carbon = 75*854. 



