1916] TREATMENT OF MOLYBDENUM ORES IN CANADA 283 
University, to investigate and report upon the possibilities of securing 
supplies of certain minerals in British Columbia; and while Professor 
Gwillim investigated or actually inspected some 45 different occur- 
rences of molybdenite his report indicates that there are but a half- 
dozen localities from which a tonnage of Molybdenite ore may be ex- 
pected within the near future. 
The following notes have been compiled very largely from Professor 
Gwillim’s report together with such other information as is readily 
accessible through Government reports, ete. 
The Molly Mine, situated on Lost Creek, about 15 miles from Salmo, 
in Kootenay, has shipped at various times during 1914 and I915 ap- 
proximately 50 tons of high grade ore to the Henry E. Wood Testing 
Plant at Denver, Colorado. In 1916 this property, under the manage- 
ment of the International Company of Orillia, Ont., has produced about 
74% tons of cobbed ore which has been shipped to the concentrator of 
the International Molybdenum Company at Renfrew, Ontario. It is 
understood that the Molly mine may be looked upon as a small producer 
of high grade ore for some little time to come. 
The Molybdenum Mining and Reduction Company of Vancouver, 
who control a molybdenite mine on the Alice Arm of Observatory Inlet, 
14 miles above Granby Bay, have expended a considerable amount of 
capital in the development of their property and may eventually become 
one of the more important producers in British Columbia. The molyb- 
denite in the ore from this mine is in the so-called amorphous condition, 
that is to say, the crystallization is so fine that it cannot be distinguished 
by the naked eye and this ore, therefore, presents some peculiar problems 
in concentration. The ore is essentially a mixture of Molybdenite and 
quartz, very little Pyrite or other accessory sulphide being present and 
mica is almost entirely absent. The problem of concentiation, there 
fore, is more particularly that of grinding the ore to a fineness at which- 
the maximum amount of molybdenite is freed from the quartz and the 
subsequent separation of the finely divided molybdenite from the gangue. 
Such finely ground material is difficult to concentrate with any degree 
of efficiency by water film flotation methods and the probabilities are 
that one of the Oil Flotation processes will have to be adopted. The 
management have so far been unable to produce a merchantable con- 
centrate on a commercial scale and the property is for the present 
inactive pending arrangements which will permit the installation of a 
suitable milling plant. 
A shipment of 350 tons of ore from this property, said to be the 
average run-of-mine, was made to the concentrator of the International 
Molybdenum Co. of Orillia, Ontario, late in the fall of 1916. It is 
