Joule's apparatus can be seen at the Science Museum in London. https://commons.wikimedia.org/wiki/File:Joule_Apparatus.jpg https://commons.wikimedia.org/wiki/Fi

Joule's apparatus can be seen at the Science Museum in London. https://commons.wikimedia.org/wiki/File:Joule_Apparatus.jpg https://commons.wikimedia.org/wiki/File:Joule_Apparatus.jpg It's a beautiful device, worth googling around for the various photos that are online. I would embed a few choice images that I found but of course HN doesn't allow that. rolling eyes emoji There's also an old Open University programme which reconstructed his experiment (conducted on his honeymoon, allegedly). It doesn't appear to be on YouTube.