92 HOFFMANN'S LIST OP 



much larger dimensions are met with. One from a coal seam on the Middle Fork of 

 the Old Man Eiver, Eocky Mountains (North-west Territory), was found to be a 

 little over an inch and a-halfin diameter, and three-quarters of an inch thick. 



170. Mineral Tar — Is often seen exuding from the deposits of bituminous sand rock 

 occurring along the banks of the Athabasca River (see note to "Asphaltum"), and in 

 numerous places on the ground at the foot of either bank, or on terraces lower 

 than their summits, this tar collects in pools, or flows in sluggish streams to 

 lower levels. It also occurs at several localities on the .shores of the western part of 

 Great Slave Lake ; at one or two places on Peace River, and elsewhere in this part of 

 the North-west Territory. 



IVI. MiRABlLiTE — Occurs at the Clifton gypsum quarry, Windsor, Hants county, province 

 of Nova Scotia ; and, associated with epsomite, as an incrustation upon the cliffs of 

 shale at Fort St. John, Peace River, province of British Columbia. Anal., G. C. 

 Hoffmann, Rep. Geol. Can., IStS-TG, p. 421. 



172. Molybdenite — Is somewhat widely distributed, being found, although in most 

 instances only in small quantities, in nearly all the provinces of the Dominion. Some 

 of the most noteworthy localities of its occurrence are those in the province of 

 Quebec, as — near the mouth of the Quetachoo River, in Manicougan Bay, on the 

 north shore of the Gulf of the St. Lawrence, where it occurs disseminated in a bed of 

 quartz six inches thick, in the form of nodules from one to three inches in diameter, 

 and in flakes which are sometimes twelve inches broad, by one-fourth of an inch 

 in thickness ; at Harvey Hill iir the township of Leeds (Megantic Co.), occurring in 

 small roiinded masses of fine granular structure, in veins of quartz and bitter-spar ; 

 and the townshiji of Aldfield (Pontiac Co.), where perfect and very handsome crystals 

 have occasionally been found, and others, less perfect but of considerable dimensions, 

 are met with. 



173. MoLYBDiTE — Has been met with in the form of an earthy yellow powder on molyb- 

 denite, in the township of Alleyn (Pontiac Co.), in the province of Quebec, and in the 

 township of Ross (Renfrew Co.), in the province of Ontario. 



174. MoNAziTE — In the form of a nodular mass, was found at the Villeneuve mica mine, 

 in the township of Villeneuve, Ottawa county, province of Quebec (Ann. Rep. Geol. 

 Can., vol. ii, p. 11 T, 1886). Dr. F. A. Genth has recently made an analysis of a 

 specimen from this locality, the results of which are given in Am. .Tourn. Sci., 3 ser., 

 vol. xxxviii, p. 203, 1889. 



175. MORDENITE — Occurs imbedded in trap, some two or three miles east of Morden or 

 French Cross, in King's county, province of Nova Scotia. Anal., H. How, .Tourn. 

 Chem Soc, new series, vol. ii, p. 100, 1864. 



176. MoRENOSlTE — Is mentioned by Dr. Hunt as having been observ<'d, as an efllores- 

 ceuce of minute acicular greenish-white crystals, on an ore of nickel from the Wallace 

 mine. Lake Huron, province of Ontario. 



177- Muscovite — Large plates and crystals of this species occur in a A'ein of graphic 

 gi'anite on Alumette Lake, at Montgomery's clearing, about five miles above 

 Pembroke, Renfrew county, province of Ontario. It is met with, in association with 

 black tourmaline, on Yeo's Island in the Upper St. Maurice (Portneuf Co.), and 

 abundantly, and not unfrequently, in crystals of very large dimensions, in a coarse 



