Lately Issued, 



BY THE SAME PUBLISHERS, 



First American, from the Fifth London Edition, Illustrated by 226 Wood Engravings, 

 and 16 Plates and Maps 2 vols. royal 8vo, 



PRINCIPLES OF GEOLOGY, 



BY CHARLES LYELL, F.R.S., 



BEING 



AN INQUIRY HOW FAR THE FORMER CHANGES OF THE EARTH'S SUR- 

 FACE ARE REFERABLE TO CAUSES NOW IN OPERATION, ETC. 



The following Notices may serve to show the high character which the above 

 work enjoys, as the Standard Text Book for advanced Students of Geology, both 

 in Great Britain and the United States : 



From the London Quarterly Review. ' We hail with the greatest satisfaction the appear- 

 ance of Mr. Lyell's work, which henceforward, we can hardly doubt, will mark the begin- 

 ning of a new era in Geology. The title of the book shows that it is an attempt to place 

 the study of the science on its true basis to explain the former changes of the earth's sur- 

 face by reference to causes now in operation. The mode in which this undertaking has been 

 executed, is most satisfactory, and confirms the high reputation Mr. Lyell enjoys for zeal and 

 accuracy in observation, and an intimacy with many of the branches of science and natural 

 history which bear upon Geology. It exhibits, also, together with much literary research and 

 elegance of language, a luminous arrangement and powers of analytical reasoning, which 

 we should be glad to meet with more frequently in the contributions to our scientific know- 

 ledge. Incorporated with his arguments, and the details extracted from other sources, Mr. 

 Lyell has, moreover, communicated a great body of original observations of much interest, 

 collected during the tours he has recently made for scientific purposes on the continent.- We 

 cannot but express our obligations to him for the great addition he has made to our knowl- 

 edge of nature, and the beneficial influence it is likely to have in communicating a right 

 direction and a philosophical spirit of induction to geological inquiry." 



From Silliman's American Journal of Science and Arts." The rapidity with which new 

 editions of this excellent Work have appeared, sufficiently evinces the estimation in which 

 it is held. We are indebted to the industry, good judgment, and great science of Mr. Lyell, 

 for a lucid and highly interesting exhibition of facts, and for a logical and candid discussion 

 of principles. He has done much to recal Geologists from extravagant speculations, and to 

 allure them back to a course of strict induction ; thus placing Geology side by side with the 

 other sciences of observation. The publication of Mr. Lyell's Work forms a new era in 

 Geology ; it must be studied by every person who would be acquainted with the present im- 

 proved state of the science ; and happily the study will prove no task ; for the lucid and 

 beautiful style of the author, embellished by occasional classical flowers, gives this Work 

 almost as peculiar a character, as its novel philosophy." 



From the Transactions of the Geological Society of Pennsylvania. "It can scarcely be 

 necessary to say any thing in praise of this Work. Its appearance will always form an 

 epoch in the history of Geology. Up to that time the doctrine which assumed the causes of 

 changes, whether of a destroying or productive character, actually in progress on the surface 

 of the globe, to be utterly inadequate to explain, scarcely even to illustrate, the earlier changes 

 of which that surface exhibits such striking traces, held almost undisputed sway in the geologi- 

 cal circles. Mr. Lyell. applying himself to the elucidation of the existing causes of change, 

 and their probable influence on the older geological formations, with an industry and research 

 which are joined to the happiest powers of description and command of language, has pro- 

 duced a Work not only of the highest interest to the scientific world, but of the most popular 

 and fascinating nature to the general reader." 



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