Engraving of a cylinder sun dial. Also known as a shepherd's or pillar dial,this is a latitude-specific design and so is not suitable for travel. A horizontal gnomon is adjusted for the date (set around the top disc of the cylinder) and is pointed in the direction of the sun so that the shadow falls vertically along the cylinder. The time is read from the length of the shadow. This illustration first appeared in the Gentleman's Magazine in 1793 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Middle Temple Library |
Bildgröße: | 3415 px × 5433 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |