58 Prof. E. N. Horsford on Glycocoll, 



Art. VIII. — Glycocoll {Gelatine Sugar) and some of its Pro- 

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



(Continued from Vol.iii, p. 331.) 



Compounds of glycocoll and sulphuric acid are even more re- 

 markable than those with hydrochloric acid. As little success at- 

 tended the effort to ascertain the precise conditions under which 

 some of them are formed, as rewarded the labors with the com- 

 pounds already described. Of these, two, the double sulphate of 

 glycocoll and oxyd of ammonium, and the anhydrous sulphate of 

 glycocoll, have especial interest, as they throw much light over 

 the constitution and nature of this body. 



Anhydrous Sulphate of Glycocoll. 



Gl, SO,. 

 By dissolving glycocoll in hot spirits of wine, cooling, adding 

 sulphuric acid drop by drop, and setting aside in a quiet place, 

 after a day or two there are formed beautiful elongated thin flat 

 prisms with right angled terminal planes. From another portion 

 the salt crystallized in the most delicate attenuated tables of the 

 greatest brilliancy. It is soluble in water and hot diluted alcohol, 

 and quite insoluble in absolute alcohol and ether. It tastes sour 

 and reddens litmus paper, does not change upon exposure to the 

 air, and loses no weight by 100° C. (212° F.) 



Combustion with chromate of lead gave the following results: 

 I. 0-5147 grm. gave 0-4257 carbonic acid and 0-2509 water. 

 II. 0-3134 " " 0-2574 " " « 01616 

 III. 01541 " " 01260 « " 



u 



IV. 0-3397 " " 0-7039 platin-salammoniac. 

 V. 0-4248 " " with chlorid of barium 0-4673 grm. sul 

 phate of baryta. 



In per cent, expressed agreeing with, 



I. II. III. iv. v. 



Which 



Carbon, 2255 22-40 22-30 



Hydrogen, 5-41 5-72 . . 



Nitrogen, . . . . . . 



Sulphuric acid, . . . . . . 



1305 



37-97 



C 4 H 4 N0 3 , SO 



as 



31 ~^3J 



ana 



Carbon, - 



Hydrogen, 



Nitrogen, 

 Oxygen, 



(Sulphuric acid, 



4 equiv. = 24 

 4 " =4 



1 » =14 



3 " =24 



1 " =40 



Theory 



22-66 

 377 



1320 



22 64 



37-73 



1061 100 T 00 



"Experiment 

 2242 



5-56 



1305 

 2100 



1 0000 



