OF CENTRAL CANADA PART II. 73 



fibove). The more important localities of the yellow ore, lie in the 

 townships of Stukely (Grand Trunk)Mine, &c.), Ely (Ely Mine, &c.), 

 Bolton (Huntington Mine, Ives Mine, <kc.), Leeds (Harvey Hill 

 Mine, &c.), Halifax (Black Lake Mine), Inverness, Tringwick, Chester, 

 Ham, and others. Also in the townships of Ascot (Ascot Mine, 

 Belvidere Mine, Lower Canada Mine, Albert Mine, Capel or Eldorado 

 Mine, Victoria Mine, Marrington Mine, Griffith's Mine, Clark Mine, 

 Ac.), Button, Brome, Melbourne (Coldstream M., Balrath M.), and 

 Cleveland.* Copper Pyrites occurs also in true veins in this district, 

 as at the Harvey Hill and Nutbrown mines in Leeds, as well as in 

 Inverness, and elsewhere. 



C. ARSENIDES AND SULPHIDES OF NICKEL AND IRON. 



17 Arsenical Nickel Ore: Pale copper-red, with dull greyish tar- 

 nish. Hexagonal in crystallization, but mostly in irregular masses. 

 Brittle. H = 5.0 5.5 ; sp. gr. 6.7 7.3- BB, emits a strong 

 odour of garlic, and melts into a dark (sometimes magnetic) globule. 

 One hundred parts contain : Arsenic 56, Nickel 44, but some of the 

 nickel is commonly replaced by iron, and sometimes by cobalt. 



The above characters are those of the ore in its' normal state. In 

 Canada, this ore, however, has only been found in admixture with 

 other metallic compounds. A mixture of this kind, in small nodular 

 masses associated with calcspar, occurs in amygdaloidal trap on Mich- 

 ipicoten Island, Lake Superior. The amount of nickel according 

 to analyses by Dr. Sterry Hunt and Prof. Whitney, varies from 

 about 17 to 37 per cent. The colour of this variety is between tin- 

 white and bronze-yellow : sp. gr. 7.3 7.4. The composition 

 indicates a mixture of arsenides of nickel with arsenides of copper 

 (Domeykite). 



Another nickleferous compound of a steel-grey colour apparently 

 a mixture of arsenide and sulphide of nickel with arsenical pyrites, 

 occurs sparingly at the Wallace Mine, Lake Huron. It was tirst 

 made known by Dr, Sterry Hunt. The surface is commonly covered, 

 more or less, with minute hair-like crystals of nickel and iron sul- 

 phates, arising from the partial decomposition of the ore. 



18. Miller ite or Sulphide of Nickel : Brass or bronze yellow. 



* A detailed list of all the copper ore localities of the Eastern Townships will be found in the 

 valuable Appendix of the Geological Surrvey Report for 1886. 



