James Prescott Joule

Events

3

Episodes

3

Years

1842–1850

Every event in Historedia whose sources name James Prescott Joule, with the role they cite and all of that event’s episodes. This is not a biography, and mentions are grouped by name, so two people with the same name can share this page.

Events and episodes

1. Julius von Mayer states the equivalence of work and heat

   1842

   Role: Physicist and rival in priority dispute

   1. 1May 1842 · Publication venuePublication of Mechanical Equivalent of Heat

      Mayer published his findings on the equivalence of work and heat in 1842, establishing a key thermodynamic principle.

2. Joule determines the mechanical equivalent of heat

   1843

   Role: Physicist and Experimenter

   1. 2August 1843 · CorkAnnouncement at the British Association in Cork

      Joule presented his experimental results on the mechanical equivalent of heat to the British Association in Cork in August 1843, receiving silence.

3. Rudolf Clausius publishes his paper on the mechanical theory of heat

   1850

   Role: Scientist

   1. 31850 · Publication VenuePublication of 'On the Moving Force of Heat'

      Clausius published his seminal paper in 1850, establishing the second law of thermodynamics by analyzing heat transfer and work.

Sources

1. Mechanical equivalent of heat Wikipedia, revision of 2025-06-23
2. James Prescott Joule Wikipedia, revision of 2026-09-06
3. Second law of thermodynamics Wikipedia, revision of 2026-10-05