First Lessons in Natural Philosophy, by Joseph C. Martindale 53778 [Subtitle: For Beginners] [Link: http://www.gutenberg.org/5/3/7/7/53778 ] [Files: 53778-0.txt; 53778-h.htm] Thanks to Stephen Hutcheson, Kate Rooney & Ian Smith, MFR and the Online Distributed Proofreading Team at http://www.pgdp.net David