Ss SK cf* . SCR ee ee. | eee ee ee ate 
sails or a me 
E. W. Hilgard on the Glacial Drift. 241 
Paper. 
Infusion of Stramonium, __ pale, distinct. 
. ite, indistinct, pale. 
< Veratria, indistinct, pale. 
Galls, distinct, distinct. 
For the light of sulphur was then substituted that of the fol- 
lowing illuminating agents, aleohol flame colored by different 
substances being used, with the accompanying results. 
Red by nitrate of strontia, no action. 
Green by nitrate of baryta, indistinct. 
Yellow by chlorid of sodium, no action. 
~ Violet by chlorid of potassium, similar to sulphur. 
by carbonate of lithia, indistinct 
Blue by blue fire, very distinct. 
Potassium, distine 
Magnesium, no action. 
The infusions of the above were spread upon paper and made 
to receive the solar spectrum. Those that produced elongation 
of the violet portion were— 
Infusion of Cinchona, very decided, 
m Esculin, very decided. 
. Quassia, very distinct. 
Philadelphia, Dec. 8th, 1866. 
ArT. XX1X.—Note on Dr. Andrews’ paper on the Glacial Drift ;* 
by E. W. Hinearp, Prof. of Chemistry, University of Missis- 
Sippi. 
fied deposits of and gravel in the Northwest to such as ex- 
hibit unquestionable evidences of glacier action, and not only 
th a their character was concerned, might 
be confined to a moderate distance from the parent glacier. 
Apart from the terminal moraine, we find them frozen into 
the bottom or sides of the glacier, and of* course into the corres- 
ponding surfaces of the iceberg detached from it. They are 
therefore liberated by thawing long before those unscored an- 
* This Jour., Jan, 1867, p. 75. 
