Sources

http://schoolworkhelper.net/oxygen-elements-uses-properties/

http://www.factmonster.com/ipka/A0775714.html

http://en.m.wikipedia.org/wiki/Joseph_Priestley#Experiments_and_Observations_on_Different_Kinds_of
_Air

http://en.m.wikipedia.org/wiki/Carbonated_water

http://digboston.com/boston-arts-theater/2009/01/18090/

http://myweb.tiscali.co.uk/priestleyofcollingha/indiI130.html