Natural Stability and the Parachute Principle in Aeroplanes,W. LeMaitre 42018 [Link: http://www.gutenberg.org/4/2/0/1/42018 ] [Files: 42018.txt; 42018-0.txt; 42018-h.htm] Thanks to Chris Curnow, Matthew Wheaton and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) Regards, Al