14 Bulletin 7 70 



Clarke, F. W., Mica. 



Min. Res. U. S., pp. 906-912, 1883-84. 

 For Virginia, see p. 908. 



Spessartite from Amelia County, Virginia. 



Bull. U. S. Geol. Surv., No. 60, p. 129, 1890. 



Clarke, F. W., & Chatard, T. M., Analysis of Water from 

 Hot Springs in Bath County, Virginia. 



Bull. U. S. Geol. Surv., No. 9, pp. 33-34, 1884. 



Clarke, F. W., Whitfield, J. E., Hillebrand, W. F., & 



Chatard, T. M., Analysis of Coal, Iron and Manga- 

 nese Ores from Virginia. 



Bull. U. S. Geol. Surv., No. 55, pp. 85-87, 1889. 



Clark, Wm. B., Third Annual Geological Expedition into 

 Southern Mar3'-land and Virginia. 



J. H. Univ. Cir., vol. ix, pp. 69-71, 1890. 



Report of the Scientific Expedition into Southern Mary- 

 land. 



J. H. Univ. Cir., vol. x, pp. 105-108, map and secftion, 

 1891. 



Correlation Papers. Eocene. 



Bull. U. S. Geol. Surv., No. 83, pp. v & 1-173, 1891. 

 For Virginia, see especially pp. 19-20, 22-23, 26, 33, 35, 38, 46-4S, 

 80-81. 



The Annual Expedition of the Students in Geology, 1892. 



J. H. Univ. Cir., vol. xii, pp. 53-54, 1893. 



Contribution to the Eocene Fauna of the Middle Atlan- 

 tic Slope. 



J. H. Univ. Cir., vol. xv, pp. 3-6, 1895. 



The Potomac River Se(ftion of the Middle Atlantic Coast 



Eocene. 



Amer. Jour. Sci., 4th ser., vol. i, pp. 365-374, secftion, 

 1896. 



The Eocene Deposits of the Middle Atlantic Slope, in 



Delaware, Marjdand, and Virginia. 



Bull. U. S. Geol. Surv., No. 141, pp. vii & 167, pi. 11, 

 map, i; 



Claypole, B. W., The Materials of the Appalachians. 



Amer. Nat., vol. xxi, pp. 955-962, 1054-1060, map, 1887. 



