Mineralogy and Geology. 429 
should be expected from such a corps, every part of the ingcats is the 
result of thorough and laborious research. The volume commences with 
a geographical ‘description of the country, and of its rapes to the fea- 
tures of the continent. It then takes up the geology of Canada, and, 
commencing with the Laurentian system, gives full details as to the struc- 
ture, distribution, etc., of the formations in order. Numerous figures and 
see so beautifully worked out in the course of the survey, and also 
uebec group, so rich in its contributions to our knowledge of the 
ancient life of the globe, are described with full details and many illus- 
io 
At the 454th page: < commences the Lithological part of the volume, 
e ial 
occupies 220 s essor nt 
characters of th is minerals, and mineral waters, gives numerous 
nalyses, and discusses, with many original views, the formation of 
nerals, rocks, and mineral veins, and the general subject of 
following 160 pages, commencing with the ores of iron and other metals, 
and continuing with the subjects of an E add mineral paints, 
peat, bitumen, plumbago, clays, ep aps ea st 
T the pode ae of American and 
foreign rocks, a list of Lower Silurian Fossils, indicating by asterisks the 
formations in which the species occur, a list of Graptolites, and a num- 
r of pages of additional figures of fossils. 
It is announced oe et following maps will form an Atlas to be issued 
to accompany the 
- A colored ewolenses map of British North America, and of the 
adjacent pes of the United States ; on a scale of 125 miles to an inch, 
This is reduced from a map on a scale of 25 miles to an inch; which. is 
Gane Lower Silurian formatio 
3. A detailed map of the Hers nian series, along the north shore of 
Lake Huron, showing also the slates of the Laurentian and Silurian 
systems ; on a scale of eight miles or an inch. 
4. A detailed map of a portion of the Quebec group, from Stanbridge, 
C.E., to St. Albans, Veemone showing also its Dag to the Potsdam 
and Trenton groups ; scale of two miles to an i 
of the Pate of the Quebec group at t Point Lévis; on a 
scale of a ate to three inches. : : 
6. A map of the Superficial Geology, which will be upon the same 
as number 1. 
