MARYLAND GEOLOGICAL SURVEY 59 



1893. 



Anon. General Mining News — Maryland. 

 Eng\ and Min. Jour., vol. lvi, 1893, p. 404. 



Clark, W. B. Physical Features [of Maryland]. 



Maryland, its Resources, Industries and Institutions, Baltimore, 1893, pp. 

 11-54. 



Darton, K H. The Magothy Formation of Northeastern Maryland. 

 Amer. Jour. Sci., 3rd ser., vol. xlv, 1893, pp. 407-419, map. 



Day, Wm. C. Stone. 



Mineral Resources U. S., 1891, Washington, 1893. 



Stone. 



Mineral Resources U. S., 1892, Washington, 1893. 

 Hill, E. T. Clay Materials of the United States. 

 Mineral Resources U. S., 1891, Washington, 1893. 



Keyes, C. E. Some Maryland Granites and their Origin. (Eead 

 Dec. 1892.) 



Bull. Geol. Soc. Amer., vol. iv, 1893, pp. 299-304, plate x. 



Keyser, W. Iron. 



Maryland, its Resources, Industries and Institutions, pp. 100-112, Balti- 

 more, 1893. 



Whitney, Milton. The Soils of Maryland. 



Md. Agri. Exper. Sta., Bull. No. 21, College Park, 1893, 58 pp., map. 



Williams, G. H. Mines and Minerals [of Maryland]. 

 Maryland, its Resources, Industries and Institutions, Baltimore, 1893, 

 pp. 89-153. 



, and Clark, W. B. Geology [of Maryland]. 



Maryland, its Resources, Industries and Institutions, Baltimore, 1893, pp. 

 55-89. 



1894. 



Clark, Wm. Bullock. The Climatology and Physical Features of 

 Maryland. 



1st Biennial Rept. Md. State Weather Service, 1894. 



Grimsley, G-. P. Granites of Cecil County in Northeastern Mary- 

 land. 



Jour. Cincinnati Soc. Nat, Hist., vol. xvii, 1894, pp. 56-67, 87-114. 

 Also published separately. 



Maryland State Weather Service. The Climatology and Phy- 

 sical Features of Maryland. 



First Biennial Report of the Maryland State Weather Service for the years 

 1892 and 1893. Baltimore, 1894. 



