* %. 
x yee Murchison’s Siluria. 371 
da: after Bri UCE’S fai: pr idijother locality, ” Copper glance, Brubescite : add 
nm (see a SILVER GLANCE). The author is 
Mr. 
Prince's Location n Lake Huron 
indebted for the Ts of Canada localities to Lopes Rep. Geol. Canada, and to 
A unt. 
P. 498.—On the Geological on of the Crystalline Limestones ; (Com ted), 
—The si a limestones of northern New York, and those of the whollet the 
north side of the St. tmetpaee Valley are by Mr. T.S. Hunt referred to the Laurentian 
[Azoic] System of rocks, which underlies the New York system, pers the re 
te e erkshir » Mass. of northw: 
Connecticut, and of eee New York, N. Jersey and Pennsylvania belong 2 te 
Trenton group o wer Silurian rocks, The serpentines and dolomites which i 
found 39 along the chiteris line of these limestones from Lower Canada through 
to 
Sata a wnat at New Haven, Milford and Hoboken, appear to belong to thé upper part 
of the Hudson River group; while the limestones exte ending from Lake Memphre- 
dow i i 
Coleraine, Ashfield, Deerfield, Whately and’ Be: Mass., - 
nan ; to lso belong the calcareo- ks of western Connecticut, 
and probably those of Bolton farther east in the same State. e limestones of 
ernMassachusetts, as in Chelmsford, Bolton and Boxborough, and those of Wal- 
pole in he s to be of Devonian and Carboniferous age. The 
same crystal ha als alike in the highly altered rocks of the Laurentian, 
oe ae evan y stems. See Mr. Hunt's - aper it the Am. Jour. Sei, 
a» ts . 
— * . i 
we Ps 
«: x XXXVIL —Review of Murchison’s Siluria. 
# p 
HE Seven whose field of. observation has been within the 
in its of the United States where the formations are spread out 
so grand a scale and where there are such immense gaps in 
2s, can hardly look at the geological map of England with- 
out wondering at the perfection of the sequence in that country 
and the smallness of the space into which so great a variety 0: 
formations have been crowded. Hardly a link in the chain, as re- 
cognised by European geologists, can be said to be wanting : of 
the 28 étages, or groups, into which all the fossiliferous rocks have 
been divided by d’Orbigny, only two have not been recognised 
in England, and of these, one, the étage Danie, is only a few 
age in thickness. And how much of the ardor and success 
th which geology has been cultivated in Degandi is due to the 
mult plicity and variety of the fonts foes themselves, as it were, 
into the notice of every one who ever cast a gldnce at the rocks 
beneath his feet. he facilities Suck that country affords for 
obtaining a clear insight into the structure of the earth gives to the 
iglish geologist, in some important respects, very great advan- 
tages over his co-laborers in the same science in this country. 
Not to to speak of the physical suffering which must be gone 
through in exploring the remote portions of our territory, how 
ks containt janice Remains, 
ola epee ie otha Dicertation ne my Gold ocr the earth ; by Si Mooascx Inet 
Munouisox, &e. de’ London, 1854. 
