MINERALS— METALLIC 157 



come handicap of great distance from the principal consuming centers. The chief 

 advantage at Philipsburg is the fact the ores are suitable, or may be readily made 

 suitable for the manufacture of dry-cell batteries in the manufacture of which 

 25,000 to 50.000 tons of ore are consumed annually at a price two or three times 

 as large as the price paid for ore of ordinary grades. The advantages at Butte 

 are that the deposits can be developed and the ore removed without additions 

 to the workings needed to exploit the ores of other metals, the abundant facilities 

 available for concentrating the ore and making ferroalloys. 



Deposits ranging from high to low grade are reported by U. S. G. S. in Castle 

 district, Meagher comity ; Xeihart, Cascade county ; "Wiclces and Renova, Jefferson 

 county : three miles northwest of Anceney, Gallatin county ; on Trapper Creek, 

 nine miles west of Melrose, Beaverhead county ; in Dry Georgia Gulch, east of 

 Twin Bridges, and seven miles southwest of Xorris. Madison county. 



Montana has ores suitable for the two alloys in common use, ferromanganese 

 and spiegeleisen. The L'nited States imported .33.022 long tons of ferromanganese 

 in 1919; 27 long tons of spiegeleisen; o33.341 long tons (total imports) of man- 

 ganese ore in 1919. 



M0LYBDENU3I 



Uses — A metal of potential rather than actual use. Encoiu-aging results 

 reported from experiments made with a view of using small quantities molyb- 

 denum to make steels of high tensile and torsional strength and great elasticity. 

 Also used in incandescent lamps and in X-ray tubes. 



Occurrence — The U. S. G. S. says, "among the principal deposits of molyb- 

 denum ores known are near Emigrant (Park county), and at other 



places in Montana" Also reported by U. S. G. S. in Potosi mining district, 14 

 miles southwest of Pony, Madison county. Reported tv;o miles east of Ophir, 

 Powell county, and also .30 miles northwest of Dillon, Beaverhead county, 10 miles 

 west of Oregon Short Line. 



In 1919, 106,743 pounds of molybdenum ore were imported. 



TUNGSTEN 



Uses — Constituent of steels for making high-speed tools, also as a filament 

 for incandescent lamps. A tungsten-iron alloy used for making valves and valve 

 stems for airplane and high-power automobile engines. Pure tungsten used in 

 Roentgen ray tubes. 



Occxirrence — In the Potosi mining district. 14 miles southwest of Pony, 

 Madison county. L'. S. G. S. says, "although originally mined for silver, these ores 

 are of interest now chiefly because they contain tungsten". X'o extensive develop- 

 ment. Vein in general persistent in strike and dip. one to six feet in thickness. 

 Tungsten occurs as hubernite in streaks one to twenty inches thick. One sample 

 assayed 4.5 per cent tiuigstic acid. Reported by "\Mnchell in form of hubernite in 

 the Birdie and Scottish Chief mines at Butte. In form of scheelite has been 

 mined and shipments made from Jardine district. Park coimty. 



In 1919, 9,408 short tons of tungsten-bearing ores were imported into the 

 United States. 



URANIUiVI 



Uses — As an alloy for making high speed tools, in gas mantles and electric 

 lamp filaments ; in salts and other forms used for iridescent glass and pottery 

 glazes, in porcelain-painting and calico-printing, in medicine" and in chemical de- 

 determinations. Most widely known as the chief soiu-ee of radiiun which is ex- 

 tracted chiefly from the carnotite and pitchblende ores of the uranium group. 



Occurrence — State School of Mines tested sample of uranium ore from Carbon 

 comity that ran about 25 per cent in radioactivity. 



In 1919, 6,020,005 pounds of steel hardening ore were imported. 



