On the Philosophy of Discovery, by William
   Whewell                       51555
     [Full title: On the Philosophy of Discovery, Chapters Historical and
                   Critical]
     [Link: http://www.gutenberg.org/5/1/5/5/51555 ]
     [Files: 51555-0.txt; 51555-h.htm]
   Thanks to Sonya Schermann, Les Galloway and the Online
   Distributed Proofreading Team at http://www.pgdp.net (This
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   Chuck