424 M. A. Naquet on the Calculus 



It is the same for the compound ammonias. The equations 

 by which we have represented the formation of these bodies 

 take, in Sir B. C. Brodie's notation, the following form : — 



a 3 /c 2 a) + a 2 v = otco + a 4 /eV. 



Iodide of Ammonia. Iodhydric Ethylamine. 

 ethyl. acid. 



ot?/c 2 co + «Vv = aa> + a 6 k^v = diethylamine, 



a 3 /e 2 a) + a 6 /eV — aa) + cx?/c 6 v = triethylamine, 



a 3 /c 2 e» + a 8 /eV = a n /e 8 <wv = iodideof triethylammonium. 



That is to say, the ammonias and the compound ethyJic salts 

 of ammonium result simply from the addition of ethylene, 

 a 2 K 2 to ammonia, or to the salts of ammonium. We have, 

 in fact, 



a?v + ot 2 K 2 = a 4 k 2 v = ethylamine ; 



Ammonia. Ethylene. 



dti&v + a 2 /c 2 = a 6 /e 4 j> = diethylamine ; 



Ethylamine. Ethylene. 

 «Vv + a?fc 2 = a 8 k 6 v = triethylamine ; 



Diethyl- 

 amine. 



+ (a 2 /e 2 ) 4 = a i:L /eW = iodide of tetrethylammonium. 



Iodide of 

 ammonium. 



Now, since Sir B. C. Brodie rejects every atomic speculation 

 which would necessarily place a limit to these different addi- 

 tions, his theory shows for each hydrocarbon an indefinite 

 number of chlorine, bromine, or iodine derivatives, and an 

 equally indefinite number of alcohols, aldehydes, and acids ; it 

 shows also an indefinite number of compound ammonias for 

 each alcohol, of amides for each acid, &c. &c. 



We can, in fact, according to the new system of notation, 

 perform upon the symbol of perchloride of carbon, a 2 «% 4 , the 

 same operation that we can perform upon marsh-gas, perchlo- 

 ride of methyl, chloruretted chloride of methyl, and chloro- 

 form themselves. Thence we obtain the following equations: — 



" 2 *% 3 + "X 2 = a X + A x 4 > 



Chloroform. Chlorine. Chlorhydric Perchloride 

 acid. of carbon. 



« 2 *x 4 + *x 2 = a x + « 2 *x 5? 



Perchloride Chlorine. Chlorhydric 

 of carbon. acid. 



