326 



Prof. E. N. Horsford on Glycocoll, 



Art. XXV. — Glycocoll ( Gelatine Sugar) and some of its Pro- 

 ducts of Decomposition ; by Prof. E. N. Horsford. 



(Concluded from p. 70.) 



Products of Decomposition of Glycocoll. 



Action of Sulphuric Acid. 

 As glycocoll contains the elements of fumarate of ammonia, 



C t H 4 N0 3 , HO=NH 4 O, C, H0 3 , 



it was conceivable that the employment of the appropriate agen- 

 cies might effect a simple decomposition into these two mem- 

 bers. Neither potash nor baryta, however, were found capable 

 of expelling the ammonia. But upon dissolving in diluted sul- 

 phuric acid, and evaporation by heat to syrup consistence, re- 

 dissolving with water, again evaporating, and repeating this pro- 

 cess several times, at a certain stage, not definitely ascertained, the 

 whole crystallizes in forms of great beauty ; — which when wash- 

 ed with alcohol and pulverized, with addition of potash yield 

 ammonia. 



Some of the crystals were nearly cubic, reminding one of chlo- 

 ric! of sodium, others were rhombic with feathered margins. 

 1 hey taste and react acid, and do not change upon exposure to 



Dried over sulphuric acid and analyzed, thev gave the follow- 

 ing results. ' J & 



0-4302 grm. of sub. gave 0-2031 carb. acid and 0-2099 water. 



iiiviiro^ cc ti « 



i. 



II. 0-3526"" 



III. 0-3574 " 



IV. 0-4958 " 

 Expressed in per cents. 



u 





0-8062 platin-salammoniac 

 08300 platin-salammoniac. 

 0-6090 sulphate of baryta. 



Carbon, 

 Hydrogen, 

 Nitrogen, 

 Sulph 



i. 



12-87 

 542 



ii. 



in. 



IV. 



14-40 



14-63 



These numbers give the formula : 



41-85 



C 4 H, NO,, S0 3 ,HO+NH 4 0, S0 3 HO, 



as the juxtaposition of the per cents, of analysis and those de- 



rived from direct estimate will show : 



Carbon, 

 Hydrogen, 

 Nitrogen, 

 Oxygen, 



S 



ulphurie acid, - 



4 

 10 

 2 

 6 

 2 



equiv 



M 



tt 

 it 

 It 



24 



10 



28 

 48 

 80 





Theory 



12-36 

 5-26 

 1473 

 25-04 

 4210 



190 



100 00 



] 00-00 



