Notes on some Canadian Minerals. 173 



the past year did considerable development work on the 

 property with a view to working the ores for silver, but 

 nothing is being done at present. 



Only one other recorded occurrence of this interesting 

 species in Canada has come under the writer's notice, viz : 

 that from the Fraser River, British Columbia. ' 



2. Molybdenite. 



Some time ago a specimen of this mineral, collected by 

 Mr. .T. D. Frossard, Mining Engineer, Montreal, in La- 

 brador, was placed in my hands by Mr. B. T. A. Bell of the 

 " Canadian Mining Review." 



It is interesting as a contribution to our knowledge of the 

 minerals of that little known land. It occurs in broad 

 foliated plates and nodules in a light colored, rather coarsely 

 crystalline granitic rock which at first sight closely re- 

 sembles a crystalline limestone, or dolomite, but is almost 

 wholly composed of quartz and felspar. 



3. Sphalerite or Blende. 



During the past summer several good specimens of this 

 sulphide of zinc were collected by the writer from the 

 quartz veins in the townships of Risborough and Marlow, 

 Beauce Co., Quebec, described by Dr. Ells in his report on 

 that region. 2 



Some very fine crystals were observed, but it was found 

 impossible to obtain perfect specimens of them, as they are 

 exceedingly fragile and imbedded in a very hard and com- 

 pact quartz. 



Twinned octahedra up to an inch in diameter occur, hav- 

 ing the planes very smooth and angles sharply defined. 



The best specimens were obtained from the " Armstrong " 

 vein, mentioned in Dr. Ell's report. 



4. Pyrite. 



Crystals of this well-known mineral lately found by .Mr. 



1 Ann. Report Geol. Surv. Can. 18S6, Part T, p. 9. 



" 1887-88, Part R, pp. 106,161. 

 - Ann. Report Geol. Surv. Can. 1886, Part J, p. 59. 



" 1888-80, Part. K, p. 77. 



