Geology. 287 
is geologically so meagre, as a few facts and sections proving the exact 
age of these uplifts would be of great interest. The details are promised 
in the full Geological Report. : : 
These uplifts were alluded to at the Albany meeting of the American 
Association by Mr. Worthen, who stated that the strike of them was 
On the Paleontology of the Thuringian Forest, by R. Ricurer and Fr. 
User. 100 pp, 1 plates. ith 15 
or the Fossil Fishes of Austria, by. ded: eee RS Pee 
Plates, 
On the Gasteropoda of the Trias of the Alps, by Dr. M. Hérvzs, with 
plates, eae 
On Foraminifera of the Family Stichostegues of D’Orbigny, by J. L. 
i plates. 
here are also other papers.—by Dr. K. M. Drestne on the Acantho- 
] h, : 
Metamorph is Rocks ; by T. Sterry Hust, Esq., of the Geological 
Survey a ef (Proc. Ray. Soe,, in L, E. and D, Phil. Mag., xv, 68.) 
~4n my last ; 
Silurian’ Strata of Canada, I endeavored to show, from the — snd 
analyses of the altered and unaltered rocks, that it is the reaction betw 
ie Sedimentary deposits, which has given rise to the serpentines, tales, 
. = d 
n of carbonate of soda has the power of dissolving quartz un 
lar Conditions.* te ng to conte these observations, I have since made 
llowing e dea te, 5 
Volorless Caan quartz was ignited, finely 0 5 — 
boiled for an hour with a soliition of its weight « pe we yp a 
hate of soda; the amount of silica thus dissolved was 1°5 per c 
* Bischof ’s Chem. and Phys. Geology, Eng. Edition, vol. i, p. 7. 
we 
