58 Prof. E. N. Horsford on Giycocoll, 
Art. VII.—Glycocoll ( Gelatine Sugar) and some of its Pro- 
ducts of Decomposition ; by Prof. E. N. Horsrorp. 
(Continued from Vol. iii, p. 381.) 
Comprounps 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. 
Gi, SO... ; 
By dissolving glycocoll in hot spirits of wine, cooling, adding 
sulphurie 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. 7 
Combustion with chromate of lead gave the following results: 
I. 0°5147 grm. gave 0-4257 carbonic acid and 0-2509 water. 
TE 'O-3i34 “eee A Hs a5 PEGIOS 
TEE. O°ES SE OO 8 GL ZOO" SF ei 
IV. 03397 “  “ 07039 platin-salammoniac. 
V. 0:-4248 “ with chlorid of barium 0-4673 grm. sul- 
phate of baryta. 
In per cent. expressed agreeing with, 
I. Il. III. Iv. V. 
Carbon, 22°55 22-40 22°30 
Hydrogen, Hat eae 7 ae he vs 
Nitrogen, gg hisn sib lhe dea isOe* 
Sulphuric acid,. . or chy Baie) Le 
Which give the formula 
4 a NO;; SsO,, . 
as the comparison of estimated and analytical results shows. 
Theory. (Experiment 
rbon -  - =. =. .|4- equiv, =.24 22-66 224% 
OTC eT ee 377 556 
Nitrogen te, COO ele Oem 13:20 13:05 
sulphur ae as Dae 8 ty ee aoe ae 
ulphuric aci - Le a ae By 
eg ; 106! —Too-00 | T0000 
