Lives of Boulton and Watt
- Facsimile of Samuel Smiles 1865 book which also includes a history of the invention and introduction of the steam engine.
- http://quod.lib.umich.edu/cgi/t/text/text-idx?c=moa;idno=AGW9706

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.
- http://www.history.rochester.edu/steam/hart/

James Watt and True Steam Power
- Essay on his attempt to improve the performance of the Newcomen engine.
- http://www.chem.ualberta.ca/~plambeck/che/p102/p02032.htm

James Watt
- Online version of biography by Thomas.H.Marshall. First published in 1925.
- http://www.history.rochester.edu/steam/marshall/

The Invention of the Steam-Engine : Watt's Early Inventions
- Article describing his early life, his work and the funding required to turn the invention into a commercial proposition .
- http://www.history.rochester.edu/steam/lord/4-1.htm

James Watt by Andrew Carnegie
- Full text of this eleven chapter biography .
- http://www.history.rochester.edu/steam/carnegie/

James Watt: Dynamic Power for Living
- An article for the Deep Cove Crier by the Reverend Ed Hird .
- http://www3.bc.sympatico.ca/st_simons/cr0001.htm