380 Prof. E. N. Horsford on Gilycocoll, &§c. 
The rational constitution of this salt may be considered as one 
atom of hydrated glycocoll, united to one atom of hydrochlorate 
of hydrated glycocoll, thus, Gl, HO+Gl, HCl, HO. 
Basic Hydrochlorate of G'lycocoll. 
; ; (c.) 3Gl, 2HCl, 2HO. 
This salt was prepared in the same manner as the last; a sim-#* 
ple solution of glycocoll in hydrochloric acid, set aside to crystal- 
ize. acid was, however, in excess. 
It was also prepared by passing dry hydrochloric acid gas over 
melted hydrate of glycocoll. For this purpose, a gramme and a 
half of substance was distributed along the bottom of a Liebig’s 
drying apparatus, and carefully heated with a spirit lamp; at the 
same time conducting over it hydrochloric acid gas. Ata tem- 
perature of between 150° C. and 170° C. [between 302° F. and 
338° as determined in an oil bath, the glycocoll melts in 
the acid atmosphere. It was found better, however, to employ 
the simple lamp. With the latter the apparatus could be readily 
inclined or half inverted, to spread the molten substance over the 
interior of the tube, and thus facilitate absorption. - 
The absorption is attended with the escape of aqueous vapor. 
The process was continued until no further increase in weig 
was observed. At each interval the hydrochloric acid was thor- 
oughly removed by long continued passing of dry air through the 
tube before weighing. At the end of the absorption, the glycocoll 
usually became slightly green, owing doubtless to a trace of de- 
composition and separation of carbon. 
rom an analysis of crystals obtained by the first method, 
I. 1-2560 grm. of substance, gave 1-2520 grm. chlorid of silver. 
By the other method, 
II. 1-9727 grm. of hydrated glycocoll, increased in weight to 
2°4580 grm. Precipitated with silver, this gave 2°3855 grm. chlo- 
rid of silver. The increase in weight was 24°60 per cent. The 
per centages of chlorine, I. 24:59; II. 24-23. 
hese numbers correspond to the formula, 
3(C, H, NO,)+HCl+2HO0, 
which requires 24-51 per cent. of chlorine. 
Basic Hydrochlorate of Glycocoll. 
. id.) 3G Sel BO: 3 
This salt is prepared precisely as the last mentioned, both by 
crystallization from the acid solution and by leading dry hydro- 
hloric acid gas over fused hydrate of glycocoll. 7 
The notice of this salt would scarcely have been ventured up- 
on, had not a precisely corresponding compound with sulphuric 
acid been analyzed. It will contribute to show how multifarious 
may be the relations of a body, that combines as a salt, an a 
possesses both acid and basic properties. % 
