.220 Reviews and Notices of Books. 



occurring in a length of about 120 fathoms. Proceeding south- 

 westwardly, the space occupied by tbe most northern mass, from 

 a breadth of a few inches, gradually widened out to about ten 

 fathoms, in a length of about forty fathoms ; beyond which it ap- 

 peared to be thrown about fourteen fathoms, obliquely to the 

 westward. The general bearing of the succeeding two masses 

 was still to the south-west. They were about fifteen fathoms ; 

 apart, and the larger or more southward one swelled to a breadth 

 of more than fifteen fathoms. The depth to which the ground has 

 been worked on the general slope of the bed, is about ten fathoms. 

 The cupriferous rock at this depth has a breadth of about twelv© 

 feet in a shaft on the northern mass, and shows rich ore in the 

 floor and the parts adjacent ; but with the exception of what is 

 called Pike's pit, in the most southern part, the floors of the other 

 masses do not at present exhibit that same abundance of ore which 

 characterized the upper part. The working of the mine however 

 up to the present time, has been confined to the extraction of the 

 rich ore which was in sight. Little or nothing has been done for 

 discovery, and it cannot be said how near to the present floor 

 of the mine, may be found other masses, similar to those that 

 have been excavated. Beyond these masses in opposite directions on 

 the surface, the ore becomes more scattered in the strata ; but 

 there is evidence of its continuance for several hundred feet, in 

 spots and patches occasionally aggregated into masses of much 

 less importance than the three principal ones. In the first few 

 weeks' work in 1859, about 300 tons of ore, containing nearly 

 thirty per cent, of copper, were quarried, in open cuttings, from 

 two of the masses, without making much apparent impression on 

 the quantity in sight. The total quantity sent from the mine up 

 to the end of ] 861, is said to be nearly 6000 tons; holding on the 

 average about seventeen per cent., of copper. — Quebec gro^ip^ 

 Lower Silurian.^'' 



The catalogue gives similar details respecting our deposits o^ 

 iron, nickel, silver, gold, chromic iron, petroleum, plumbago, 

 building stones, marbles, slates, clays, &;c., and should be in the 

 hands of every one interested in the economic geology of the' 

 country. It is, we believe, on sale at the bookstores, j. w. D. 



