Direct Measurement videos show situations that viewers can use to learn and apply physics concepts. Grids, rulers, and frame-counters are added as overlays on the video. These allow viewers to make precise measurements of quantities such as position and time.
From the Magnet Lab, a website devoted to learning about electricity and magnetism, is a profile of James Joule.
From archive.org, this is a collection of Joule's papers published in 1884 by the Physical Society of London.
Google - Research database allows searching of the scholarly literature.