52 THE PHYSICAL FEATURES OF CECIL COUNTY 



1836. 



Ducatel, J. T. Keport of the Geologist, n. d. 8vo, pp. 35-84. 

 Plate. 



Separate publication (see Ducatel and Alexander). 



Ducatel, J. T., and Alexander, J. H. Eeport on the New Map of 

 Maryland, 1835. 8vo, 84, 1 pp. [Annapolis, 1836.] 



Md. Pub. Doc, Dec. Sess., 1835. 



Another edition, 96, 1 pp. and maps and plate. 



Engineer's Eeport, pp. 1-34; Eeport of the Geologist, pp. 35-84. 



Eeport of the Engineer and Geologist in relation to the New 



Map to the Executive of Maryland. 



Md. Pub. Doc., Dec. Sess., 1835 [Annapolis, 1836], 8vo, 84, 1 pp., 6 maps 

 and plates. 



(Eev.) Amer. Jour. Sci., vol. xxx, 1836, pp. 393-394. 



Jour. Franklin Inst., vol. xviii, n. s. 1836, pp. 172-178. 



1837. 



Ducatel, J. T. Outline of the Physical Geography of Maryland, 

 embracing its prominent Geological Features. 



Trans. Md. Acad. Sci. and Lit., vol. ii, 1837, pp. 24-54, with map. 



Ducatel, J. T., and Alexander, J. H. Eeport on the New Map of 

 Maryland, 1836. [Annapolis, 1837.] 8vo, 104 pp. and 5 maps. 



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

 Another edition, 117 pp. 



Tyson, Philip T. A descriptive Catalogue of the principal minerals 

 of the State of Maryland. 



Trans. Md. Acad. Sci. and Lit., 1837, pp. 102-117. 



1838. 



Ducatel, J. T. Annual Eeport of the Geologist of Maryland, 1837. 

 [Annapolis, 1838.] 8vo. 39, 1 pp. and 2 maps. 

 Md. Pub. Doc, Dec. Sess., 1837. 



1839. 



Ducatel, J. T. Annual Eeport of the Geologist of Maryland, 1838. 

 [Annapolis, 1839.] 8vo, map and illustrations. 33 pp. 

 Md. Pub. Doc, Dec. Sess., 1838. 



