Intelligence and Miscellaneous Articles. 219 



The authors state that theory would give — 



C6 45000 36-0 



H3 18-75 1-5 



N» 787-50 62-5 



1256-25 1000 



These numbers are confirmed by the results obtained by M. Voelc- 

 kel in analysing glaucene, which, according to Mi\l. Laurent and 

 Gerhardt, is merely mellon derived from the dry distillation of po- 

 liene (A.), and of persulphohydrocyanic acid (B.). The results of M. 

 Voelckel are as follows : — 



A. B. 



Carbon 35-4 357 36-2 



Hydrogen 1-6 1-6 1-8 



Azote 63-0 627 62-0 



100-0 1000 100-0 



From numerous experiments, MM. Laurent and Gerhardt have 

 arrived at the following conclusions : — 



1. Mellon is not, as supposed by M. Liebig, a binary compound, 

 comparable with cyanogen ; for besides carbon and azote, which are 

 not in the proportions stated by M. Liebig, it contains one and a 

 half per cent, of hydrogen, and is represented by C H3 N^. 



2. The formation of mellon by chlorinated cyanamide does not 

 occur, as stated by M. Liebig, accompanied simply with hydroclilorate 

 of ammonia, but there is also disengaged an enormous quantity of 

 hydrochloric acid, amounting to about 16 per cent. 



3. Chlorinated cyanamide contains double the quantity of chlorine 

 stated by M. Liebig, and ought to be represented by C^ H'' CI N*. 



4. By the influence of potash, chlorinated cyanamide is converted 

 into ammehne C' H^ N^ O, or ammelide C3 H'' N^ 0'-. 



5. The new substance, the formation of which has been recently 

 announced by M. Liebig from urea, is a body previously known by 

 the name of ammelide. 



6. Ammelide does not possess the composition attributed to it by 

 M. Liebig ; it contains C' IV N'' 0-, as had been previously stated 

 by one of the authors. 



7. The melam of M. Liebig is an impure mixture of poliene C H* 

 N" and mellon. 



8. The dry distillation of persulphohydrocyanic acid, as stated by 

 M. Liebig, does not occur ; but the assertions of M. Voelckel respect- 

 ing this phsenomenon are correct. 



9. The sulphuret of cyanogen does not possess the composition 

 adopted by M. Liebig : it contains hydrogen, and is represented by 

 C^ HN^ S^ ; it cannot therefore be the radical of the sulphocya- 

 nurets. 



10. Heat does not decompose mellon, as stated by M. Liebig, 

 into three volumes of cyanogen and one volume of azote ; but the 

 products vary according to the temperature, and always contain hy- 

 drogenated compounds, to the complete destruction of the mellon. 



Q2 



