Thus, it will be seen that there is not only a considerable difference between the two sorts of asbestos which supply the demands of the market, but that the mode of winning it is also different; as are, moreover, the natural indications which guide the explorer in his search after the mineral. FOOTNOTES: [1] "Encyl. Brit." Art. "Asbestos." [2] A member of the Geological Survey Department, Ottawa. [3] See _post_, p. 66. CANADIAN MINING FOR ASBESTOS. And now I will leave the subject of the Italian mines altogether, and proceed to give some account of the asbestos mining industry as carried on in Canada; mainly the result of my notes and observations during a residence at the mines. The main sources from which the supply of asbestos in the Dominion is derived lie in the province of Quebec, in the counties of Megantic and Beauce. The serpentine rock in which it is found crops up at intervals all along the belt of what has been previously alluded to as the "altered Quebec group"[4] (pre-Cambrian), throughout a range of over 120 miles in length, occasionally attaining a width of more than 2,500 feet, mostly bearing from north-east to south-west, and crossing the Coleraine District nearly east and west. It extends almost uninterruptedly from the boundary of Vermont, in the State of Maine, running north-eastward, to some distance from the Chaudière River, a little beyond the latitude of Quebec. Large tracts of serpentine, probably containing the mineral in paying quantities, occur at Belmina in Wolfe County, and in the vicinity of Brompton Lake; but although the work of exploration has been carried on in several places with fair prospects of success, the profitable working of the mineral up to the present time has been mostly confined to Broughton, Thetford, Coleraine, and Danville. In the Shickshock mountain region of New Brunswick, said to be a detached area of the pre-Cambrian formation, which constitutes the chief mineral belt of the Eastern Townships (within which the last-mentioned districts are comprised), serpentine and chromic iron are the only two minerals which have as yet been recognised. Looking, however, to the fact that these two minerals everywhere accompany the deposits of chrysotile, as well as the ores of copper, lead, and antimony, with occasionally richer deposits of gold and silver, in the region to the south-west, it would scarcely seem unreasonable to anticipate discoveries of asbestos in the as yet unexplored region of the Gaspé peninsula. The range here extends through the northern portion of the peninsula in rear of Saint-Anne des Monts, and further east on the lower part of the Dartmouth River.[5]