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Dear Tom, and others who may be confused by this, Waldo is correct. Basic physical geography: great circles, such as the equator and all lines of longitude, which can be infinite in number, are abstract lines that divide the earth into two equal halves, at any angle. The five "great circles" of the Greeks, whatever they are, are not actually great circles: at least the tropics of cancer and capricorn are not. (They do not divide the earth into equal halves.) Howard Horowitz Professor of Geography Ramapo College [email protected] _______________________________________________ MapHist: E-mail discussion group on the history of cartography hosted by the Faculty of Geosciences, University of Utrecht. The statements and opinions expressed in this message are those of the author and do not necessarily reflect those of the University of Utrecht. The University of Utrecht does not take any responsibility for the views of the author. List Information: http://www.maphist.nl Maphist mailing list [email protected] http://mailman.geo.uu.nl/mailman/listinfo/maphist
