Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6, by Various 37461 [Subtitle: "Geodesy" to "Geometry"] [Link: http://www.gutenberg.org/3/7/4/6/37461 ] [Files: 37461.txt; 37461-8.txt; 37461-h.htm] Thanks to Marius Masi, Don Kretz and the Online Distributed Proofreading Team at http://www.pgdp.net David