f / / [Mi i * 



MANUAL 



GEOLOGY: 



TREATING OF THE PRINCIPLES OF THE SCIENCE 



WITH SPECIAL REFERENCE TO 



AMEEICAN GEOLOGICAL HISTOEY, 



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



BY 



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



3ILLIMAN 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 qnodammodo contemplari pulchritudinem renim ean 

 quas divina providentia dicimus constitutas.— CiC. 

 Nunquam aliud natura aliud sapientia dieet.— Jut. 



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

 FIGURES, MOSTLY FROM AMERICAN SOURCES. 



PHILADELPHIA: 



PUBLISHED BY THEODORE BLISS & CO. 



LONDON: TRUBNER & CO. 



1863. 



