https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13988384![William Thomson, Baron Kelvin. Photograph by T. & R. Annan & Sons.](https://images.rawpixel.com/image_social_portrait/cHJpdmF0ZS9zdGF0aWMvZmlsZXMvd2Vic2l0ZS8yMDI0LTAyL3djaDNrZnR1NXItaW1hZ2UuanBn.jpg)
![William Thomson, Baron Kelvin. Photograph by T. & R. Annan & Sons.](https://images.rawpixel.com/image_social_portrait/cHJpdmF0ZS9zdGF0aWMvZmlsZXMvd2Vic2l0ZS8yMDI0LTAyL3djaDNrZnR1NXItaW1hZ2UuanBn.jpg)
William Thomson, Baron Kelvin. Photograph by T. & R. Annan & Sons.
William Thomson, Baron Kelvin. Photograph by T. & R. Annan & Sons.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use