the projection hole and notch at the at its edge throws a v shaped shadow and a pointer of light at midday when its sun is at its highest. the surface of the basin is set at 5* to the vertical and on a north south orientation. this phenomena last around half an hour and its direction changes, it’s position indicating the time of year.

By rexhenry / July 31, 2021 / montage / No Comments

the projection hole and notch at the at its edge throws a v shaped shadow and a pointer of light at midday when its sun is at its highest. the surface of the basin is set at 5* to the vertical and on a north south orientation. this phenomena last around half an hour and its direction changes, it’s position indicating the time of year.