The A B C of Relativity, by Bertrand Russell 67104 [author: Bertrand Russell] [Link: https://www.gutenberg.org/6/7/1/0/67104] [Files: 67104-0.txt; 67104-h.htm] Thanks to Tim Lindell and the Online Distributed Proofreading Team at https://www.pgdp.net (This book was produced from images made available by the HathiTrust Digital Library.) Regards, Al