COMPOSITION OF FEBBEBITE AND OTHER MEMBERS OF SERIES. 29 



the trolframite series Continued. 



Besides the items noted in the table, the analysis shows A1 2 O 3 , 0.81; Bi 2 O 3 , 0.14; 

 SnO 2 , trace; MoO 3 , 0.51; H 2 0, 0.22. 



44. Ore from Wheal Gorland, Cornwall. Analysis by B. Kitto, communicated by 

 Mr. R. Woodward, managing director of Edgar Allen & Co. (Ltd.), Sheffield, England. 

 The analysis also shows: Pb, 0.10; Mg, trace; Bi, 0.15; P, trace; CaF 2 , 4.06; Cu, 0.88; 

 S,2.02; A1 2 3 , 1.77; Sn0 2 , 8.64; O, by difference, 3.96. Cu, Fe, S, and As were com- 

 bined as nearly as possible to form chalcopyrite and arsenopyrite. Although not made 

 on as pure material as might be wished for the purposes of this paper, the analysis shows 

 approximately the composition of the wolframite. 



45. Wolframite from northwest Spain (ore). Steinhart, O. J., Classification, occur- 

 rence, identification, and properties of tungsten ores: Mineral Industry, vol. 17, p. 830, 

 1909. The analysis also shows: A1 2 O 3 , 5.32; and CrO, 0.38. 



46. Wolframite from Quebrada de la Viuda, Department of San Xavier, Argentina. 

 Bodenbender, G., Die Wolfram-Minen der Sierra von C6rdoba in der Argentinischen 

 Republik: Zeitschr. pnkt. Geologic, Nov., 1894, p. 409. A trace of CaO is pres- 

 ent but no MgO. 



47. Wolframite from the confluence of the southwest Miramichi and Burnt Hill 

 Brook, New Brunswick. Walker, T. L., Recently discovered wolframite deposits in 

 New Brunswick: Econ. Geology, vol. 6, p. 397, 1911. 



48. Wolframite from Kolywanowschen mine, Altai, Siberia. Beck, W., and Teich, 

 N., Ueber Wolfram und Scheelit aus Fundorten Russlands: Russ.-k. mineral. Gesell. 

 St. Petersburg Verh., 2d ser., vol. 4, p. 317, 1869. 



49. Wolframite from Ward, Colo. Analysis by J. B. Ekeley. George, R. D., The 

 main tungsten area of Boulder County, Colo.: Colorado Geol. Survey First Rept., 

 p. 43, 1909. 



50. Wolframite from Felsobanya, Hungary. Sipocz, 

 Zusammensetzung einiger seltener Minerale aus Ungarn: 

 vol. 7, p. 270, 1886. 



51. Wolframite from Perilhao, Portugal. Bourion, F., -Sur un mode ge"ne"ral de 

 preparation des chlorures anhydres et ses applications a 1'analyse chimique: Annales 

 chim. et phys., 8th ser., vol. 21, p. 104, 1910. 



52. Ore from Wheal Gorland, Cornwall. Analysis by B. Kitto, communicated by 

 Mr. R. Woodward, managing director of Edgar Allen & Co. (Ltd.), Sheffield, England. 

 Fe (12.34) has been calculated as FeO (15.87). The analysis also shows: SnO 2 , 2.75; 

 traces of Pb and MgO; CaF 2 , 4.37; Cu, 0.45; S, 1.31; A1 2 O 3 , 4.13; and O, by differ- 

 ence, 2.95. 



L., Ueber die chemische 

 Min. pet. Mitt., new ser., 



