330 Prof. E. N. Horsford on Glycocoll, 



The decomposition may be illustrated by the following 

 scheme : 



1 equiv. cyanogen, 



1 " ammonia, ^ 



2 " oxalic acid, . 

 2 " carbonic oxyd, 

 7 M hydrogen, 



2 " glycocoll, 



. ♦ H 3 N . . 



4 \m • • • vJg 



C 3 . . . ♦ O a 



♦ • Xl y • • • • 



C 8 H I0 N 2 3 



Glycocoll and Hydrosulphuric Acid. 



The readiness with which glycocoll enters into combination, 

 and the interest attaching to sulphur compounds in the products 

 of decomposition in the organism, suggested the treatment with 

 hydrosulphuric acid. 



Taurin, according to Redtenbacher,* is — 



C 4 H 7 NO, S 3 



which he observed contained the elements of two atoms of sul- 

 phurous acid, aldehyde, and ammonia : 



C 4 H 7 NO, S 2 =C 4 H 3 O, NH 4 O, S 2 4 . 



The union of these several ingredients he succeeded in 

 effect in 



atoms of water and two of sulphur : 



hydrated 



C 4 H 7 N0 6 , S 2 =C 4 H s N0 4 , 2HO, S,. 



It was conceivable that by treating a solution of glycocoll 

 with hydrosulphuric acid, and exposing the product to oxydation, 

 a compound, consisting of glycocoll, water, and sulphur in the 

 above relations, might be obtained. 



Two atoms of Cystine : 



2(C 6 H 6 N0 4 S 2 ) 

 contain the elements of three atoms of hydrated glycocoll, from 

 which ammonia has been withdrawn, and in which four atoms ot 

 oxygen have been replaced by an equal number of atoms ot 

 sulphur : 



o lf 



H I2 N 2 8 S 4 =C 13 H I5 N 3 13 +S 4 - NH 3 -0 4 

 2(C 6 H 6 N0 4 SA 



Long continued and repeated 



result ; the hydrated glycocoll 



with neither accession nor loss. 



To obtain either of the above 

 made. 



impossible. 



~« nn a waited 



periment 



was 



Liebig's Annalen, Bd. lvii, s. 170. 



