https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13969041![Clocks: diagrams for setting-out a sundial []. Coloured engraving by J. Pass, 1809.](https://images.rawpixel.com/image_social_portrait/cHJpdmF0ZS9zdGF0aWMvZmlsZXMvd2Vic2l0ZS8yMDI0LTAyL3djeXpuajZiYXUtaW1hZ2UuanBn.jpg)
Clocks: diagrams for setting-out a sundial []. Coloured engraving by J. Pass, 1809.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use