24 COLORADO FERBERITE AND THE WOLFRAMITE SERIES. 



Analyses of minerals of 



1. Hubnerite from Philipsburg, Mont. Analysis by A. H. Low quoted from Richard 

 Pearce by Hillebrand, W. F., Miscellaneous mineral notes; Contributions to the min- 

 eralogy of the Rocky Mountains: U. S. Geol. Survey Bull. 20, p. 96, 1885. 



2. Hubnerite from the Royal Albert vein, Uncompahgre district, Ouray County, 

 Colo. Hillebrand, W. F., Miscellaneous mineral notes; Contributions to the miner- 

 alogy of the Rocky Mountains: U. S. Geol. Survey Bull. 20, p. 96, 1885. 



3. Hubnerite from Emerald, Nova Scotia. Johnston, R. A. A., Hiibnerite: Can- 

 ada Geol. Survey Ann. Rept., new ser., vol. 11, p. 10R, 1898. 



4. Hubnerite from the South Homestake mine, White Oaks, N. Mex. Analysis 

 by J. G. Dinwiddie. Besides the items given the analysis showed H 2 O at 110 C., 

 none; H 2 O above 110 C., 0.40. This hiibnerite is to the unaided eye as black as 

 the ferberite of the Boulder field, but in thin section it is translucent brown and olive- 

 green. The streak is olive-green. Microscopic examination showed no scheelite 

 but much fluorite, so that the calcium has been considered as derived from that 

 mineral. See also analysis 16. 



5. Hubnerite from Riotte's original locality, Ellsworth, Mammoth district, Nye 

 County, Nev. Genth, F. A., Contributions to mineralogy, No. 52; with crystallo- 

 graphic notes by S. L. Penfield: Am. Jour. Sci., 3d ser., vol. 43, p. 187, 1892. 



6. Hubnerite from Morococha, Peru. Analysis by Pfliicker quoted by Domeyko, 

 Ignacio, Mineralojia, vol. 2, p. 92, 1897. 



7. Hubnerite from the Natalie mine, Silverton, Colo. Ekeley, J. B., Some Colorado 

 tungsten ores: Min. World, vol. 30, p. 280, 1909. 



8. Hubnerite from Schlaggenwalde, Bohemia. Rammelsberg, C. F., Handbuch 

 der Mineralchemie, p. 309, 1860. Fine red brown needles, with fluorspar and apatite. 



9. Average of two analyses of hiibnerite from Bayevka, Ural Mountains, Russia. 

 Koulibin, Von N. v., Manganhaltiger Wolfram aus der Grube Bajewsk am Ural: 

 Russ.-k. mineral. Gesell. St. Petersburg Verh., vol. 3, 2d ser., p. 3, 1868. 



10. Hubnerite from the North Star mine, Silverton, Colo. Genth, F. A., Contribu- 

 tions to mineralogy, No. 52; with crystallographic notes by S. L. Penfield: Am. Jour. 

 Sci., 3d ser., vol. 43, p. 186, 1892. 



