Keywords: Principles of geology BHL34710319.jpg Principles of geology; being an attempt to explain the former changes of the earth's surface by reference to causes now in operation 34710319 107923 50860 Table of Contents 3 http //www biodiversitylibrary org/page/34710319 10 5962/bhl title 50860 Deshayes G P ; Lyell Charles NOT_IN_COPYRIGHT<br> Biodiversity Heritage Library Check categories 2015 October 29 PD-old-70-1923 Principles of geology Images uploaded by Fæ Files from the Biodiversity Heritage Library Biodiversity Heritage Library Charles Darwin's Library collection |