James Watt - Online version of biography by Thomas.H.Marshall. First published in 1925. www.history.rochester.edu/steam/marshall
James Watt - Biography with photographs, diagrams and animations of his double acting engine . www.geocities.com/Athens/Acropolis/6914/watte.htm
James Watt and True Steam Power - Essay on his attempt to improve the performance of the Newcomen engine. www.chem.ualberta.ca/~plambeck/che/p102/p02032.htm
James Watt by Andrew Carnegie - Full text of this eleven chapter biography . www.history.rochester.edu/steam/carnegie
Reminiscences of James Watt - This article contains the most-quoted account of the moment of Watt's invention of his steam engine. First published in 1859 by the journal of the Glasgow Archaeological Society. Includes photographs of the original publication. www.history.rochester.edu/steam/hart