OF CENTRAL CANADA PART II. 69 



promise, with gangtie of highly crystalline calc-spar heavy spar, in 

 gneiss, in the Township of Galway, Peterborough County, and in the 

 adjoining Township of Sommerville ; in Lake, Tudor, Limerick, and 

 Marmora, when numerous veins occur in gneissoid strata, * in the 

 'Township of Loughborough in Frontenac in broad veins, traversing 

 gneiss and crystalline limestone ; under similar conditions in Bedford 

 in the same county ; in Lansdowne, Leeds County ; and Rarnsay, in 

 Lanark County. Galena occurs also in narrow, deceptive, gash veins 

 (see under "Mineral Veins" in Part III.) in the Niagara dolomites 

 of Mulmur (Simcoe County), Eramosa (Wellington County), and 

 Clinton (Lincoln County). 



In the Province of Quebec, this mineral occurs especially in the 

 copper-ore veins of the Eastern Townships, as in Acton, Upton, and 

 Ascot, and in many of the quartz veins of the Chaudiere valley. 

 Galena, apparently in workable quantities has also been noticed by 

 the Geological Survey at Gaspe Cove and Indian Cove, near Cap 6 

 Gaspe (Report. 1863, p. 400*. Argentiferous galena (properly so- 

 called) occurs, according to Dr. S terry Hunt, at the St. Francis Rapids 

 011 the Chaudiere, associated with Arsenical Pyrites and Blende, and 

 at Moulton Hill, near Lennoxville. The actual amount of silver 

 appears to vary greatly, probably from intermixed particles of native 

 silver. Three dressed samples from the Chaudiere yielded respectively 

 32 oz., 256 oz., and 37 oz., per ton of 2240 Bbs. A dressed sample 

 from Moulton Hill yielded 65 oz. per ton. Other argentiferous 

 varieties are reported to occur on Lake Superior (Meredith's Location, 

 Maimanse, and elsewhere), but the silver, found in some of these 

 may be due to intermixed scales and filaments of native silver and 

 silver-glance. 



13. Zinc Blende or Sphalerite: Lustre, sub-metallic or resinous. 

 Colour (in Canadian examples) brown, black, yellow, &c. ; streak, 

 mostly pale-brown. Regular in crystallization, but occurring com- 

 monly in small irregular masses, or indistinct crystals, with well- 

 marked lamellar structure. H = 3.5 4.0 ; sp. gr. 3.9 4.2. 

 BB, infusible, or fusible on the edges only; but when stronglv ignited 

 with carb. soda on charcoal, it yields a white incrustation of zinc 

 oxide, which assumes a green colour when moistened with nitrate of 



* Some of these veins are apparently cut off, at a comparatively slight depth, by the walls 

 coming together, and their working has beeen thus abandoned ; but if the sinking were con- 

 tinued, they would probably be found to open out again. 



