30 COLORADO FERBERITE AND THE WOLFRAMITE SERIES. 



Analyses of minerals of 



53. Wolframite from Meymac, Correze, France. Carnot, A., Sur quelques mine"- 

 raux de tungstene de Meymac (Correze): Compt. Rend., vol. 79, p. 638, 1874. Any 

 alumina present is included with the silica. 



54. Wolframite from Meymac, Correze, France. Carnot, A., Sur quelques mine'- 

 raux de tungstene de Meymac (Correze): Compt. Rend., vol. 79, p. 638, 1874. 



55. Wolframite from "Wolfram" claim, 3 miles east of Oreville, S. Dak. R. C. 

 Wells, of the U. S. Geol. Survey, analyst. Si0 2 includes any other insolubles. Ta, 

 Cb, Sn, Mo, and rare earths are not present in appreciable quantities. 



56. Wolframite from Carrock Fell, England. Finlayson, A. M., The ore-bearing 

 pegmatites of Carrock Fell and the genetic significance of tungsten ores: Geol. Mag., 

 vol. 7, p. 21, 1910. 



57. Wolframite. Analysis of "typical Mount Carbine [Queensland] wolfram con- 

 centrate" by Alex. Cumming. The SiO 2 (4.0) includes "insol., etc." Besides the 

 items in the table there is also "undetermined, 0.5." Quoted by Ball, L. C., Wol- 

 fram mines of Mount Carbine. No. 1: Queensland Govt. Min. Jour., vol. 14, p. 70, 

 1913. 



58. Ore from Gordon Gulch, Boulder County, Colo. Greenawalt, W. E., The 

 tungsten deposits of Boulder County, Colo. : Eng. and Min. Jour., vol. 83, p. 951, 1907. 

 The analysis also includes: Gold, trace; silver, 3.1 ounces to the ton. The item 

 given under Si0 2 is given by Greenawalt as "Si." 



59. Wolframite from the Flowe mine, Cabarrus County, N. C. Genth, F. A., The 

 minerals of North Carolina: U. S. Geol. Survey Bull. 74, p. 80, 1891. 



60. Wolframite from Grube Pfaffenberg, Neudorf, Harz Mountains, Germany. 

 Schneider, R., Ueber die chemische Constitution des Wolfram-Minerals: Jour, prakt. 

 Chemie, vol. 49, p. 334, 1850. 



61. Black wolframite from Silver Comet mine, 11 miles west of Pioche, Nev. J. G. 

 Dinwiddie, analyst; personal communication. The analysis also showed Fe 2 3 , 2.92; 

 H 3 O below 110 C, 0.03; H 2 O above 110 C., 0.57. The FeO of the analysis gave an 



