The following sites are useful for the Socials 11 project on Technological change in the 20th Century: Greatest Engineering Achievements of the 20th Century http://www.greatachievements.org Vacuum Cleaner Museum http://www.137.com/museum/ VacHunter History http://www.vachunter.com/history.htm The Father of cool - Willis Haviland Carrier, The history of air conditioning http://inventors.about.com/library/weekly/aa081797.htm Air conditioning and refrigeration http://www.greatachievements.org/?id=2958 General Elevator and Escalator Information - History http://www.otis.com/aboutotis/elevatorsinfo/0,1361,CLI1,00.html The history of the Escalator http://inventors.about.com/library/inventors/blescalator.htm Crayola Crayon history http://inventors.about.com/library/inventors/blcrayon.htm The invention of crayons http://www.ideafinder.com/history/inventions/crayon.htm Early Radio History in the United States http://EarlyRadioHistory.us/ The history of sewing machines http://inventors.about.com/library/inventors/blsewing_machine.htm Chronology of the development of steam power, 1696-1839 http://www.saburchill.com/history/events/019.html James Watt & the history of steam power http://inventors.about.com/library/inventors/blwattsconclusion.htm The history of the airplane http://inventors.about.com/library/inventors/blairplane.htm History of the airplane http://www.first-to-fly.com/History/History%20of%20Airplane/history.htm Automobile history http://inventors.about.com/library/inventors/blcar.htm The Model T (Showroom of Automotive History) http://www.hfmgv.org/exhibits/showroom/1908/model.t.html To go back to McMath Library Homepage click here:         http://public.sd38.bc.ca/~mcmathlib This page is created and maintained by Ms. B. Knoepfel (Teacher-Librarian), McMath Secondary School.  Updated March 2007.