IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This square horizontal sundial ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

This circular horizontal pedestal sundial of bronze or brass has indicated on it the hours from V to XII to I to VII. The hour scale is divided to five minute intervals. It has three holes for screws ...