102 HOFFMANN'S LTSTfOF 



magnesia, and small quantities of quartz and magnetite, is found in the Laurentian 

 of the township of Elzevir (Hastings Co.), in the province of Ontario. Analyses, 

 T. S. Hunt, aeol. Can., 1863, p. 469. 



253. Tennantite — Occurs, in association Avith chalcopyrite, pjn'ite, quartz, etc., at the 

 Crown mine, Capelton, Sherbrooke county, in the province of Quebec. Anal., B. J. 

 Harrington, Trans. Roy. Soc. Can., vol. i, sec. iii., p. 80, 1882-83. 



254. Tetrahedrite — Ordinary tetrahedrite (containing only a little silver) occurs, in a 

 gangue of ankerite, in the vicinity of Foster's Ear, about twenty-five miles above 

 Lytton, Fraser River, and a more or less argentiferous tetrahedrite, associated with 

 variable amounts of galenite and small quantities of one or more, or all, of the fol- 

 lowing minerals, viz., pyrite, chalcopyrite, bornite, sphalerite, is found at the 

 Illecillewaet mines, between the north and south branches of the Illecillewaet 

 River, Selkirk Range, and at the International claim on the west side of Kootanie 

 Lake ; on Otter-tail Creek and Carbonate Creek ; at Cherry Creek, thirty-three miles 

 east of the head of Okanagan Lake : at some of the Stump Lake mines, Nicola Valley ; 

 on Jamiesou Creek, which flows into the North Thompson River, and elsewhere in 

 the province of British Columbia. 



255. Thomsonite — Specimens of this mineral, in the form of radiating crystals, have been 

 found at the North Mountains of King's county, province of Nova Scotia. See also 



uoteto'^Mesole." 



« 



256. TiTANiTE — Occurs in minute amber-colored grains and crystals, in the granitoid 

 trachytes of Brome (Brome Co.), ShefTord (Sheftbrd Co.), and Yamaska (Yamaska Co.) 

 Mountains, and in the diorite of Mount Johnson (Iberville Co.)— in crystals, often of 

 considerable size, of a clove-brown or chocolate-brown color, in the Laurentian of 

 the townships of Argenteuil and G-renville (Argenteuil Co.), Buckingham, Templetou, 

 Wakefield and Hull (Ottawa Co.). and at the Calumet Falls in Litchfield (Pontiac 

 Co.), in the province of Quebec. It is also met with in the Laurentian of the town- 

 ships of Sebastopol — where very large crystals are sometimes found, also fine twin 

 crystals, and a massive form — (Renfrew Co.), North Burgess— of a honey-yellow 

 color — and North Elmsley (Lanark Co.), and other townships in this part of the 

 province of Ontario. Analyses, T. S. Hunt, Oeol. Can., 1863, 503, and B. J. Harrington, 

 Rep. aeol. Can., \S11-1S, p. 28 G. 



251. Tourmaline — Principally black, but not unfrequeutly brown — is of comparatively 

 common occurrence, in many places, in rocks of the Laurentian series. Among the 

 numerous localities of its occurrence may be mentioned : — Near Hunterstowu — where 

 a single traus^Jarent Ijrown crystal, remarkable for its modifications, was obtained — 

 (Maskinongé Co.) : at Calumet Falls in the township of Litchfield, fine translucent, rich 

 yellowish-brown colored, highly modified crystals with brilliant faces— (Pontiac Co.) ; 

 in the township of Clarendon— brown crystals of great beauty — (Pontiac Co.) : in the 

 townships of Greuville and Argenteuil — black crystals — (Argenteuil Co.) : also black 

 crystals on the west side of the North River at St. Jérôme (Terrebonne Co.) - in tlie 

 province of Quebec. In the province of Ontario : — the townships of North Elmsley, 

 North Burgess and Bathurst (Lanark Co.), Ross — where crystals almost equal in 

 beauty to those from the Calumet Falls have been foixnd, — and Blythfield (lieniVew 

 Co.), Galway and Stoney Lake in Dummer (Peterborough Co.), and Charleston Lake 

 iu Leeds county. 



