lo Bulletin 7 66 



The Wythe Lead and Zinc Mines, Virginia. 



Engr. and Min. Jour., vol. Iv, pp. 561-562, 586, sketch 

 map, 1893. 



Correlations in the Coal- Rocks West of Pocahontas, Flat 



Top, Virginia. 



Trans. Amer. Inst. Min. Engrs., vol. xxiv, pp. 254-257, 

 1894. 



Bradley, F. H., On the Silurian Age of the Southern Ap- 

 palachians. 



Amer. Jour. Sci., 3d ser. , vol. ix, pp. 279-288, 370-383, 

 1875- 



Britton, N. ly., Geological Notes in Western Virginia, North 

 Carolina and Tennessee. 



Trans. Acad. Sci. N. Y., vol. v, pp. 215-223, 1887. 



Balcon}^ Falls, Archaean of Virginia. 



Appalachia, vol. v. (Not seen). 



Brock, R. A., Early Iron Manufacfture in Virginia, 161 9- 1776. 

 Proc. U. S. Nat. Mus., vol. viii, pp. 77-80, 1885. 



Brongftliart. Virginia. Calaniites suckoivii var. S , Richmond, 

 Virginia. 



Trans. Geol. Soc. Pa., vol. i, pt. i, p. no, 1834. 



Brown, W. G., Analysis of a New Mineral Containing Nio- 

 bium, from Amherst County, Virginia. 



Chem. News, vol. xxxvi, pp. 158-159, 1877. 

 Geol. Record, 1877, London, 1880, p. 228. 



On Cassiterite from Irish Creek, Rockbridge County, 



Virginia. 



Amer. Chem. Jour., vol. vi, pp. 185-187, 1884. 



Geol. Record, 1880-84 incl., London, 1889, vol. ii, p. 164. 



Occurrence of Wolframite at Irish Creek, Rockbridge 



County, Virginia. 



Amer. Chem. Jour., vol. vi, p. 185. (Not seen). 



Buck,. Stuart M., Notes on the Hard-Splint Coal of the 

 Kanawha Vallej'. 



Trans. Amer. Inst. Min. Engrs., vol. x, pp. 81-85, 188 1- 

 82. 



Bunbury, C. J. F., Descriptions of Fossil Plants from the 



