http://inventors.about.com/od/tstartinventions/a/History-Of-The-Thermometer.htm
http://www.brannan.co.uk/pages/thermometers/invention.html
http://www.buzzle.com/articles/types-of-thermometers.html
http://www.madehow.com/Volume-1/Thermometer.html
http://www.brannan.co.uk/pages/thermometers/invention.html
http://www.buzzle.com/articles/types-of-thermometers.html
http://www.madehow.com/Volume-1/Thermometer.html