Physics, by Willis Eugene
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   � [Full author: Willis Eugene Tower and Charles Henry Smith and Charles
   Mark Turton and Thomas Darlington Cope]
   � [Link: [1]http://www.gutenberg.org/4/0/1/7/40175 ]
   � [Files: 40175.txt; 40175-0.txt; 40175-h.htm]
   Thanks to Anna Hall, Albert Laszlo and the Online
   Distributed Proofreading Team at [2]http://www.pgdp.net (This
   file was produced from images generously made available
   by The Internet Archive)
   Many thanks
   Janet

References

   1. http://www.gutenberg.org/4/0/1/7/40175
   2. http://www.pgdp.net/