Bulletin 7 64 



Coal. 

 Min. Res. U. S., 1887. pp. 168-382. 

 For further references, see under Day, D. T. 



Bache, Franklin, Coal-Se(5lions Developed by Recent Oper- 

 ations in Wise County, Virginia. 



Trans. Amer. Inst. Min. Engrs., vol. xxiv, pp. 70-80, 

 sketch map, sections and table, 1894. 



Bailey, J. W., On Silicified Wood Found near Fredericks- 

 burg, Virginia. 



Proc. Acad. Nat. Sci. Phila., vol. i, p. 75, 1841-43. 



Account of Some New Infusorial Forms Discovered in 



the Fossil Infusoria from Petersburg, Virginia, and Pis- 

 cataway, Maryland. 



Amer. Jour. Sci., vol. xlvi, pp. 137- 141, plate, 1844. 



Beauvois, M., Natural Curiosities in Greenbriar County, Vir- 

 ginia, Particularly of the Tooth of a Large Nondescript 

 Animal. 



Proc. Amer. Phil. Soc, vol. i, pt. i, pp. 270-271, 1774- 

 1838. 



Only title given, May, 1798. 



Becker, Geo. F., Gold Fields of the Southern Appalachians. 

 i6th Ann'l Rep't U. S. Geol. Surv., pt. iii, pp. 251-331, 

 pis. 16-18, I fig., 1894-95. 



References to Virginia scattered more or less throughout the 

 first 50 pages. 



Benton, B R., Notes on the Samples of Iron Ore Colledled 

 in Virginia. 



loth Census U. S., pp. 261-268, 1886. 



Blake, W. P., Ores of Tin. 



Min. Res. U. S., 1883-84, p. 592-640. 

 For Virginia, see pp. 599-601. 



Birkinbine, John, The Produdlion of Iron Ores in Various 

 Parts of the World. 



i6th Ann'l Rep't U. S. Geol. Surv., pt. iii, pp. 21-218, 

 pis. I -15, maps, 1894-95. 

 For Virginia, see pp. 40, 197. 



Bowron, W. M., The Pracftical Metallurgy of Titaniferous 



