Elements of geology / by Charles Lyell.

  • Lyell, Charles, Sir, 1797-1875.
Date:
1838
Catalogue details

Licence: Public Domain Mark

Credit: Elements of geology / by Charles Lyell. Source: Wellcome Collection.

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    PREFACE. Part of the present Treatise was written origin- ally in the form of a supplement to my former work, entitled ££ Principles of Geology,” and was intended for the use of those students who found certain chapters in the Principles obscure and difficult, for want of preliminary information. I afterwards considered that it would not be incom- patible with this object to enlarge the Elements into a separate and independent treatise, to serve as an introduction to Geology proper. As I have thus been led on to become the author of two general works on the same science, it may be useful to explain to the reader that these two publications do, in fact, occupy very distinct ground. In the Principles a systematic account is given of the operations of inorganic causes, such as rivers, springs, tides, currents, volcanos, and earth- quakes; the effects of all being particularly con- sidered, with a view to illustrate geological phe- nomena. The changes also which the organic world has undergone in modern times, the geo- graphical distribution of different species of ani- a 3