11. References Thomas Edison : http://en.wikipedia.org/wiki/File:Thomas_Edison2.jpg Samuel F.B. Morse : http://www.old-picture.com/mathew-brady-studio/Samuel-Morse-B.htm Alexander Graham Bell: http://www.old-picture.com/american-legacy/005/Alexander-Graham-Bell-012.htm Elias Howe and Isaac Singer : http://www.loudreams.com/2009/09/know-your-history-the-birth-of-modern-clothing/ and http://www.sandstead.com/images/NPG_SAAM/index0002.html Cyrus McMormick: http://en.wikipedia.org/wiki/File:Cyrus_McCormick_engraving.jpg
12. References Charles Goodyear http://www.uakron.edu/libraries/bierce_scitech/about/collections/cgoodyear.dot Nikola Tesla: http://www.teslasociety.com/happybirthday.htm George Westinghouse: http://www.schenectadyhistory.org/people/ohof/westinghouse.html Richard Gatling: http://fi.wikipedia.org/wiki/Tiedosto:Richard_Jordan_Gatling_-_Brady-Handy.jpg
