Mary J. Rathbun, 



MANUAL 



a//-- 



GEOLOGY: 



TREATING QF THE PRINCIPLES OF THE SCIENCE 



"W.ITH SPECIAL gEFERENCE TQ 



AMERICAN GEOLOGICAL HISTOEY, 



FOR THE USE OF COLLEGES, ACADEMIES. AND SCHOOLS OF SCIENCE. 



BY 



JAMES D. DANA, M.A., LL.D. 



SILLIMAN PROFESSOR OF GEOLOGY AND NATURAL HISTORY IN YALE COLLEGE; AUTHOR OF 



"A SYSTEM OF MINERALOGY," OF REPORTS OF WILKES'S EXPLORING EXPEDITION 



ON GEOLOGY, ON ZOOPHYTES, AND ON CRUSTACEA, ETC. 



Licet jam oculis quodammodo contemplari pulchritudinem reruui earum, 

 quas divina provideatia dicimus constitutas. — Cic. 

 Nunquam aliud natura aliud sapientia dicet.— Juv. 



ILLUSTRATED BY A CHART OF THE WORLD, AND OVER ONE THOUSAND 

 FIGURES, MOSTLY FROM AMERICAN SOURCES- ^^^ 



REVISED EDITION. 



PHILADELPHIA : 

 PUBLISHED BY THEODORE BLISS 



LONDON: TRUBNER & CO. 

 1867. 



