and some of its Products of Decomposition. 63 



that characterizes all or nearly all the compounds of this body. 

 Dessaigne obtained the salt directly from hippuric acid by em- 

 ploying oxalic instead of a stronger acid, to effect the decomposi- 

 tion. It does not alter upon exposure to the air. 



Combustion with chromate of lead gave the following : — 0-3600 

 grm. gave 0-4227 grm. carbonic acid, which in per cent, express- 

 ed, gives carbon 32-02, corresponding with the formula 



C 4 H 4 N0 3 , C 2 3 , H0 7 

 which requires 32-43 per cent, of carbon. 



Acetate of Glycocoll. 



Gl, HO, A, 2HO. 



This salt is readily prepared by dissolving glycocoll in acetic 

 acid, and adding absolute alcohol drop by drop, till the solution 

 becomes turbid, and then afterward at intervals, as the crystalli- 

 zation proceeds. The salt analyzed was prepared by adding ab- 

 solute alcohol in excess to a concentrated solution of glycocoll in 

 acetic acid, (the latter in excess,) by which the salt was thrown 

 down. It was then redissolved by heat, and set aside to cool and 

 crystallize, by which slender prismatic crystals of great beauty 

 were obtained. 



On combustion with chromate of lead, 0-2981 grm. gave 0-3644 

 grm. carbonic acid and 0-2031 grm. water, which in per cent, 

 expressed correspond with carbon 33-33, hydrogen 757. The 



formula 



C A H 4 N0 3 , HO+C 4 H 3 0,+ 2HO, 



requires of carbon 3333 per cent, and of hydrogen 6-94 per cent. 



Tartrate of Glycocoll. 



By dissolving glycocoll in tartaric acid and adding absolute al- 

 cohol in excess to the solution, an oily appearing liquid separates 

 and settles to the bottom. Repeated and protracted agitation 

 with alcohol and ether effect no change. This liquid dried upon 



a watch glass gave a erummv mass which was not further inves- 

 tigated. b ' 



Palmatinate of Glycocoll. 

 By dissolving palmitinic acid and glycocoll in hot spirits of 

 wme, and setting aside to cool, the excess of acid rises to the sur- 

 face in the form of an oil, while the salt crystallizes in white, thin, 

 1 jky, radiating scales or blades of the greatest brilliancy. The 

 01l y layer, above, which with the whole mass becomes solid, 

 S^y be readily removed, and the remainder pressed in silk and 

 a j?ed in the air over sulphuric acid. Combustion with chromate 

 ot lead gave the following results : 



i. ii. in- 



Carbon, - 51-30 51-23 50-84 



Hydrogen, - 9-45 . . 944 



