Geology and Mineralogy. 133 
By the prolonged action of chlorhydric acid upon aldehyd, Wurtz 
obtained also the anhydride of aldol (€,H,9),0. The author 
remarks that aldol in many respects resembles the sugars, glucose 
being like aldol, at the same time an aldehyd and an alcohol.— 
Comptes Rendus, Tome Ixxiv, p. 1361. Lona 
II. Grotoay anp MINERALOGY. 
1. Fossils probably of the Chazy era in the Eolian Limestone 
of West Rutland ; by E. Burtrxes. (From a letter to J. 
Dana, dated Montreal, May 23.)—I received last summer som 
fossils from Rev. Wing, and made the following note upon 
them before I sent them back. : 
5th June, 1871, from the Rev. A. Wing, twenty specimens 
with the following ticket: 
“Encrinites and obscure fossils, supposed to be Trenton, col- 
lected May, 1870, at the marble quarries, West Rutland, not one 
d r 
o 
Most northern one worked on the southwest side of the valley, 
Say one hundred and fifty rods southwest from Barns’ hotel, West 
Rutland.” 
_ If Hitchcock's Eolian is Stockbridge limestone, then the latter 
Meludes the Chazy. The plate of the Cystidean, P. tenuiradiatus 
all, is a never-failing guide to the Chazy ; at least it is so on the 
aoe ms Lake Champlain. oe ate 
ayden Kxplorin edition. the covery 0, 
bee Pnnaticn in be tee of Idaho; by Prof. F. H, 
Brapiey, Geologist of the Expedition. (From a letter to J. D. 
Dana, dated Fort Hall, Idaho, July 7th, 1872.)—I write to 
announce the discovery of the Quebee group. I first found it in 
be conside i dsto: I trace 
red as representing the Potsdam sandstone. I tr 
sae d, nearly coniiiioasee to the angle of Port Neuf Cafion— 
@ distance of over fifty miles. At this latter point the bed seems 
Me thin somewhat, and is overlaid by 1,000 feet or more of quartz- 
es 
