734 PRELIMINARY OBSERVATIONS. 



N .O.N 



o- 



Allantom . . . s^rr, or 



3 . 



3 



Doubling the atom of allantoin, that substance and its com- 

 pound with oxide of silver will be : 



* 



' 8 -H 5 Ag 



From the different action of potash upon the isomeric bodies, 

 Dutch liquid and protochlorinated chloride of ethyl, there can 

 be little doubt but their molecular formula? are really different : 



Dutch liquid ^ '-==; protochlorinated chloride of ethyl ^^7 

 C/4 . H v> 4 5 



and while the other chlorinated compounds of chloride of ethyl are 



TT /"-ll TT pi! 



A 3 an( j 2__4 j those of olefiant gas, isomeric with the pre- 

 C 4 C 4 



TT r-ii pii 



ceding, are, as appears by the action of an alkali, ^ 2> , and 



TTCM C 1 ! 



3 * For from Dutch liquid and the two last mentioned com- 

 pounds, potash withdraws HC1, and liberates three compounds 

 of the same type : 3 , ~^~ and 3 . 



The elements which are chlorous together or basic together 

 in a compound, certainly exert an influence upon each other, 

 although they are not to be supposed to be combined, as those 

 of different nanre are with each other. For we find a tendency 

 among them to arrange themselves in pairs. Thus the chlo- 

 rinated compound of oxide of ethyl, most readily formed, is 

 that of which the empyrical formula is C 4 H 3 C1 2 O, and the mo- 

 lecular formula 3 p --, or rather - 2 -p 2 - , of which the three 



atoms of hydrogen are associated with three still more chlorous 

 atoms namely two of chlorine and one of oxygen. There can 

 be no doubt that these three remaining atoms of hydrogen are 

 thus in some degree defended from the farther action of chlorine, 

 and less easily removed than the other two. 



The molecular formula of oil of bitter almonds, or hydruret of 



benzoyl appears to be ^- 2 ; of hydrated benzoic acid - s 3 ' = 

 C 14 C 14 . II- 



