516 Reviews and Notices of Booh. 



Descriptive Catalogue of the Economic Minerals of Canada and of 

 its Crystalline EocJcs, by Sir W. E. Logan and T. Sterry Hunt. 

 This catalogue, prepared for the Great Exhibition in London, is 

 an instance of that thoroughness which characterises everything 

 attempted by Sir AV. E. Logan. It is in truth a descriptive list of 

 everything known to be of economic value in Canadian mineralogy; 

 and must be of immense service to the industrial interests of the 

 province ; more especially when practical men in England can 

 compare its clear and accurate statement of facts with actual 

 specimens of the products themselves, as exhibited in London. 

 Mr. Hunt adds a similarly descriptive catalogue of rocks ; which 

 with the specimens exhibited, will present to European geologists 

 a better exposition of the lithology of Canada than, in so far as 

 we are aware, any other region on this side of the Atlantic can 

 boast, and one quite equal, to say the least, to anything of the 

 kind afforded by European rock collections. 



We cop3% as specimens, the notices of a few of the more impor- 

 tant of the newer mining localities and their products. 

 " Ramsay Mines, Ramsay, lot 3, range Q... Foley & Co.y Montreal^ 

 "A vein cutting nearly horizontal beds of grey, geodiferous, 

 brown-weathering dolomite. The vein is composed of calcspar, 

 and has a breadth varying from two and a half to five feet, in 

 which the galena is disseminated in a width of from eight to twenty- 

 four inches. In some portions the vein is almost dead ground, 

 while in others, judging by the eye, it would yield nearly two 

 tons of eighty per cent, per fathom. The bearing of the lode is 

 about N.W., and its underlie to the north-eastward, about a foot 

 in a fathom. A trial shaft has been sunk on the lode to the depth 

 of thirty-seven feet, and the working of seventy-five fathoms of 

 ground, in 1858, yielded twenty-six tons of ore of eighty per cent. 

 A smelting furnace was erected to reduce the ore, and a ten horse- 

 power engine used to give blast to the furnace and dry the shaft, 

 but a considerable spring of water having been struck, it became 

 necessary to erect a more powerful engine,and one of fifty horse- 

 power has just been completed. The dolomite is underlaid con- 

 formably by sandstone, which crops out about a mile from the 

 mine, and is unconformably supported by crystalline limestone 

 and gneiss of Laurentian age. About 105 fathoms south-eastward 

 from the main shaft, a counter-lode joins the main one, at an 

 angle of about 20° ; its course being nearly N.N.E. and S.S.W. 

 At the junction of the two lodes a shaft has been sunk in sand- 



