REPORT 



of the 



GEOLOGICAL RECONNOISSANCE 



OF Till; 



STATE OF VIRGINIA. 



•MADE UNDER THE Al'l'OlNTMENT OF THE BOARD OF 1'UBLIC WORKS. 



BY WILLIAM 13 



1'ROFESSOR OF NATURAL PHILOSOPHY l.N THE L'MVKRSITV OF VIRGINIA. 



PHILADELPHIA : 



DES1LVER, THOMAS & CO 

 1836. 





