56 Introduction 



1818 



Macluee, Wm. Observations on the geology of the United States of 

 North America; with remarks on the probable effects that may be pro- 

 duced by the decomposition of the different classes of rocks on the nature 

 and fertility of soils : applied to the different States of the Union, agree- 

 ably to the accompanying geological map. 



Trans. Amer. Philos. Soc, n. s., vol. i, 1818, pp. 1-92, 2 plates. 



1824 

 Sheiver, James. An account of surveys and examinations, with re- 

 marks and documents, relative to the proposed Chesapeake and Ohio and 

 Ohio and Lake Erie Canals. Baltimore, 1824, 116 pp. and map. 



Shriver, Howard. Catalogue of fossils found at Cumberland, Md. 

 (n. d.) 4 pp. 



1833 



DucATEL, J. T., and Alexander, J. H. Eeport on the projected survey 

 of the State of Maryland, pursuant to a resolution of the General 

 Assembly, 8vo, 39 pp. and map. Annapolis, 1834. 



Md. House of Delegates, Dec. Sess., 1833, 8vo, 39 pp. 



Another edition, Annapolis, 1834, 8vo, 58 pp., and map. 



Another edition, Annapolis, 1834, 8vo, 43 pp., and folded table. 



Amer. Jour. Sci., vol. xxvii, 1835, pp. 1-38. 



1834 



AiKix, William E. A. Some notices of the geology of the country 

 between Baltimore and the Ohio Eiver, with a section illustrating the 

 superposition of the rocks. 



Amer. Jour. Sci., vol. xxvi, 1834, pp. 219-233. 



1836 



DucATEL, J. T., and Alexander, J. H. Report on the new map of 



Maryland, 183G. 8vo, 104 pp. and 5 maps. [Annapolis, 1837.] 



Md. House of Delegates, Dec. Sess., 1836. 

 Another edition, 117 pp. 



