Ill Geological Bibliography of Virginia 55 



The Clinch Valley Coal Fields. 



Min. Res. U. S., 1892, pp. 521-528. 



McCreath, A. S., & Piatt. Description of Locality of Tin 

 Ore, Rockbridge County, Virginia. 



Bull. Iron and Steel Assoc, November 7, 1883, p. 207. 

 (Not seen). 



McDonald, M., Semi- Annual Report of the Superintendent 

 of the Virginia Military Institute. Inclosing the Report 

 of a Geological and Mineral Examination of a Portion 

 of the James River Iron Belt. 

 Richmond, 1879, 23 pp. and Map. 



Report of a Geological and Mineral Examination of a 



Portion of the James River Iron Belt. 



The Virginias, vol. i, pp. 10-13, "i^P ^"^ sedlions. 1880. 



"Note. — From a semi-annual report of the Supertntendent of 

 the Virginia Military Institute, January, 1879. Reproduced in full, 

 with the illustrations." 



McDowell, F. H., Stripping Ore Deposits. 



Trans. Amer. Inst. Min. Engrs., vol. xviii, pp. 627-639, 

 figures, 1890. 



The Bertha Zinc Mines, Virginia, pp. 632-639. 



McGee, W J, Report of pp. 34-41. Map of the United 

 States, Exhibiting the Present Status of Knowledge Re- 

 lating to the Areal Distribution of Geologic Groups. 



5th Ann'l Rep't U. S. Geol. Surv., pp. 36-38, map as 

 pi. 2, 1885. 



Potomac Formation. 



Phil. Soc. Wash., Read June 13, 1885. (Not seen). 



The Geology of the Head of Chesapeake Bay. 



7th Ann'l Rep't U. S. Geol. Surv., pp. 537-646, pis. 

 56-71, figs. 109-114. 



{Abst.) Amer. Geol., vol. iv, pp. 1 13-115, 1889. 



Geography and Topography of the Head of Chesapeake 



Bay. 



{Abst.) Amer. Jour. Sci., 3d ser., vol. xxxii, p. 323, 

 1886. 



Amer. Assoc. Adv. Sci., 1886. Read. 



Geological Formation Underlying Washington and Vi- 

 cinity. (Report of the Health Officer of the Distri(5l of 



