May – James Watt makes a breakthrough in the development of the steam engine by constructing a model with a separate condenser,[1] an idea which has come to him in a walk on Glasgow Green.
^Williams, Hywel (2005). Cassell's Chronology of World History. London: Weidenfeld & Nicolson. p. 323. ISBN 0-304-35730-8.
^Kermack, W. R. (1944). 19 Centuries of Scotland. Edinburgh: Johnston. p. 80.
^Ewan, Elizabeth; Pipes, Rose; Rendall, Jane; Reynolds, Siân (eds.). The new biographical dictionary of Scottish women. Edinburgh University Press. p. 5. ISBN 9781474436281.