T PRINCIPLES OF GEOLOGY: BEING AN INQUIRY HOW FAR THE FORMER CHANGES OF THE CAUSES NOW IN OPERATION. BY CHARLES LYELL, ESQ., F.R.S. PRESIDENT OF THE GEOLOGICAL SOCIETY OF LONDON. "Amid all the revolutions of the globe, the economy of Nature has been uniform, and her laws "Verè scire est per causas scire."-BACON. IN TWO VOLUMES. VOL. I. FIRST AMERICAN, FROM THE FIFTH AND LAST LONDON EDITION. PHILADELPHIA: JAMES KAY, JUN. & BROTHER, 122 CHESTNUT STREET. PITTSBURGH: JOHN I. KAY & CO. 1837. |