BC Gnomonics

Two of a kind The scaphe and hemicyclium each do an excellent job of imaging the celestial sphere in microcosm, arguably more intuitively...

Specialized sub-types of the OERD While the equatorial ring dial sits at both the end and peak of portable sundial development, it has...

To classify sundials is a notoriously difficult task Pinning down the defining characteristics of anything man-made proves difficult, as...