Origin of the Grand Outline Features of the Earth. 381 _ 
From crystals of the salt prepared as above mentioned, 
I. 1-2864 grm. gave 1-:3203 grm. chlorid of silver. — 
II. By leading dry hydrochloric acid gas over glycocoll in the 
manner already described, a compound was formed, of which, 
1:1370 grm. gave 1:1845 grm. chlorid silver. 
In per cent. expressed, these determinations give, 
(C, H, NO,)+2HCl+HO, 
which requires 25-30 per cent. of chlorine. As the probable ra- 
tional constitution of the above salt the following is submitted, 
; (Gl HCl+Gl, HO)+Gl HCL. 
Anhydrous Hydrochlorate of Gilycocoll. 
Having found a basic hydrochlorate, which might be regarded 
asa double salt of one atom of hydrate of glycocoll, with one 
atom of anhydrous hydrochlorate ef glycocoll : 
oA NOwy C, H, NO,, HCl, 
and especially having found as will be seen below, an anhydrous 
sulphate of glycocoll, it was natural to suppose that the anhydrous 
hydrochlorate might be obtained by itself, viz. C, H, NO,, HCl. 
To this end absolute alcohol was saturated with hydrochloric 
acid gas, and this added to a solution of glycocoll in hot spirits of 
: Upon evaporating the liquid, delicate prismatic crystals 
appeared which deliquesced with the greatest rapidity. ‘They 
even dissolved in absolute alcohol. This latter circumstance led 
to the supposition that the crystals might have been a double salt 
of hydrate of glyeocoll with hydrochlorate of oxide of ethyle. 
This supposition was further strengthened from an analysis of a 
sulphate of corresponding constitution soon to be noticed. 
(To be continued.) 
Arr, XXXIX.—Origin of the Grand Outline Features of the 
Earth; by James D. Dana. 
