104 



.1. SAKÜR.U. 



is exceedingly like glycocoll Ijoth in its ])Iiysi("il and chemical proper- 

 ties, and does not possess any acid character, it ought, conse([nently, 

 to be represented by the fornuila, 



CO.O 



I I 



aH,.NH, 



I 



CO.XH, , 



and called mccinamic ijhjcocoll. Aspartic acid, generally expressed in 

 name and formula as " amido-succinic acid," 



CO.OPI 



I 

 aH3.NIL 



I 



CO.OH , 



must in reahty be (considered as monobasic, inasmucli as its so-called 

 normal salts containing alkali metals are easily decomposed by car- 

 bonic acid, and the only salts known in a definite state are the so- 

 called acid salts. This body must, therefore, be regarded as succinic 

 ghjcocoU, and represented by the formula, 



CO.O 



I I 



CO.OPI . 



The fact that a mono-ethyl ester is obtained 1)y direct etherification 

 of aspartic acid also goes to support this view of its constitution. 



'I'he above consideration leads to the prediction not only of the 

 existence of two chemically isomeric asparagins, as is predicted by the 

 current view, 



