26 Bulletin 7 82 



Fig. IV (p. 166). Transverse sedlion of the vein or load when 

 looking towards the north-east in the deep shaft No. 10. 



Del Rio, Andres, & Millington, Jno., Report of— 

 Trans. Geol. Soc. Pa., 1834, pp. 147-156. 



Dewey, F. P., The Rich Hill Iron Ores. 



Trans. Amer. Inst. Min. Engrs., vol. x, pp. 77-80, 1881- 

 82. 



Note on the Falling Cliff Zinc Mine. 



Trans. Amer. Inst. Min. Engrs., vol. x, pp. 111-112, 

 1881-82. 



Note on the Fire Creek Coke of West Virginia. 



Trans. Amer. Inst. Min. Engrs., vol. xii, pp. 386-387, 

 1883-84. 



D'Invilliers, B. V., & McCreath, A. S., The New River- 

 Cripple Creek Region of West Virginia. 



Harrisburg, 1887, 171 pp., 4 plates, and map in pocket. 

 For further reference, see under McCreath, A. S. 



Douglas, Jas., The Copper Resources of the United States. 

 Trans. Amer. In.st. Min. Engrs., vol. xix, pp. 679-704, 

 1891. 



For Virginia, see p. 694. 



Drown, Thos. M., The Condition of Sulphur in Coal, and 

 its Relation to Coking. 



Trans. Amer. Inst. Min. Engrs., vol. ix, pp. 656-663, 

 1880-81. 



Punning-ton, F. P., On Microlite from Amelia County, Vir- 

 ginia. 



Chem. News, vol. xliv, p. 44, 1881. ^ 



Geol. Record, 1880-84 inch, London, 1889, vol. ii, p. 181. 

 Amer. Chem. Jour., vol. iii, p. 130, 1881. 

 Amer. Jour. Sci., 3d ser. , vol. xxii, p. 82, 1881. 

 {Abst.) Amer. Nat., vol. xvi, p. 79, 1882. 

 See Amer. Chem. Jour., 3d ser., vol. ii, p. 130. 



Analysis of Columbite and Monazite of Amelia County, 



Virginia. 



Amer. Nat., vol. xvi, p. 611, 1882. 



Geol. Record, 1880-84 inch, London, 1889, vol. ii, p. 181. 



— New Analysis of Columbite and Monazite from Amelia 



Count}', Virginia. 



