22 Apr
2012
22 Apr
'12
8:29 p.m.
Popular scientific lectures, by Ernst Mach 39508 [Translator: Thomas Joseph McCormack] [Link: http://www.gutenberg.org/3/9/5/0/39508 ] [Files: ; 39508-0.txt; 39508-h.htm] Thanks to Anna Hall, Albert László and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) Chuck