The Principles of Stratigraphical Geology, by J. E. Marr 43963 [Link: http://www.gutenberg.org/4/3/9/6/43963 ] [Files: 43963.txt; 43963-8.txt; 43963-h.htm] Thanks to Chris Curnow, Tom Cosmas and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) David