44 THE PHYSICAL FEATUUKS OF ST. MARY's COUNTY 



1852. 



Desoe, P]. Post Pliocene of tlie Southern States and its relation to 

 the Laurentiau of tlie Xortli and the Deposits of the Valley of the ilissis- 

 sippi. 



Amer. Jour. Sci., 2cl ser., vol. xiv, 1852, pp. 49-59. 



Fisher, E. S. Gazetteer of the State of Maryland compiled from 

 the returns of the Seventh Census of the United States. New York 

 and Baltimore, 1852, 8vo, 122 pp. 



HiGGiNS, James. The Second Report of James Higgins, M. D., State 

 Agricultural Chemist, to the House of Delegates of Maryland. 8vo. 

 118 pp. Annapolis, 1852. 



Md. House of Delegates, Jan. Sess., 1S52 [C], Svo, 126 pp. 



1856. 



HiGGiNs, James. Fifth A|gricultural Eeport of James Higgins, State 

 Chemist, to the House of Delegates of the State of Maryland. Svo. 

 91 pp. Annapolis, 1856 (published separately). 



Also Md. House of Delegates, Jan. Sess., 1856. 



Md. Sen, Doc. 



Another edition, pp. 15-18 omitted, Svo, 90 pp. 



1860. 



Tyson, P. T. First Eeport of Philip T. Tyson, State Agricultural 

 Chemist, to the House of Delegates of Maryland. Jan. 1860. 8vo. 145 

 pp. Annapolis, 1860. Maps. 



Md. Sen. Doc. [E]. Md. House Doc. [C]. 



1861. 



Conrad, T. A. Fossils of the (Medial Tertiary or) Miocene Forma- 

 tion of the United States. No. 4. 1861 (?). pp. 81-89, index and 

 plates xlv-xlix. 



(Repub.) by W. H. Dall, Washington, 1893. 



Tyson, P. T. [Letter from Mr. Tyson of Maryland on Tripoli.] 

 (Eead Dec, 1860.) 



Proc. Acad. Nat. Sci., Phila., vol. xii, 18C1, pp. 550-551. 



1862. 

 CoNKAD, T. A. Catalogue of the Miocene Shells of the Atlantic 

 Slope. 



Proc. Acad. Nat. Sci., Phila., vol. xiv, 1862, pp. 559-582. 



