

PRINCIPLES 



OF 



GEOLOGY 



OB THE 



MODERN CHANGES OF THE EARTH 



AND ITS INHABITANTS 



CONSIDERED AS ILLUSTRATIVE OF GEOLOGY 



By SIR CHARLES LYELL, Bart. M.A. F.R.S 



1 Vere" scire est per causas scire ' — Bacon 



* The stony rocks are not primeval, but the daughters of Time '—Linn^us, Syst. Nat. 

 ed. 5, Stockholm, 1748, p. 219 > 



' Amid all the revolutions of the globe the economy of Nature has been uniform, and her 

 laws are the only things that have resisted the general movement. The rivers and the rocks, 

 the seas and the continents, have been changed in all their parts ; but the laws which direct 

 those changes, and the rules to which they are subject, have remained invariably the 

 same ' — Playfair, Illustrations of the Huitonian Theory, § 374 



a 



TENTH AND ENTIRELY REVISED EDITION 



In Two Volumes;— Vol. I. 







Illustrated with Jl/Taps, (plates, and Woodcuts 





LONDON 



JOHN MURRAY, ALBEMARLE STREET 



1867 



J8JASL98 



The right of translation is reserved 



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