Geological facts; or, the crust of the earth, what it is, and what are 72100 [Full title: Geological facts; or, the crust of the earth, what it is, and what are its uses] [Full author's name: W. G. Barrett] [Author: W. G. Barrett] [Link: https://www.gutenberg.org/7/2/1/0/72100] [Files: 72100-0.txt; 72100-h.htm] Thanks to Richard Tonsing, Charlene Taylor, Bryan Ness, and the Online Distributed Proofreading Team at https://www.pgdp.net (This book was produced from scanned images of public domain material from the Google Books project.) Regards, Jacqueline