Cylinder sundial, c 1850
A boxwood cylinder sundial, also known as a shepherd’s dial or pillar dial, c 1850 a portable, altitude dial in which hour lines for different dates are delineated around the surface of a cylinder, which is allowed to stand or hang vertically. A horizontal gnomon projects radially from the top of the cylinder, and is adjusted to the appropriate date around its periphery. The dial is held with the gnomon facing the sun so that the shadow falls vertically. Latitude specific. 12 cm high with a 2,6 cm diameter.