Weale's Series of Scientific and Technical Works, by Anonymous 63907 [Link: http://www.gutenberg.org/6/3/9/0/63907 ] [Files: ; 63907-0.txt; 63907-h.htm] Thanks to deaurider and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) Regards, Al