Vertical sundial οf western orientation

Previous exhibit                                                                                                                   Next exhibit

EXHIBITS    >    The clocks of the ancient Greeks    >   

Vertical sundial
οf western orientation

A vertical net orientated to the West with 6 engraved hour lines and three curves indicates, with the help of the shadow trace from the horizontal (vertical to the net) gnomon tip, the 5 unequal (depending on the season) daily hours before the sunset (8th, 9th, 10th, 11th and 12th). The horizontal hour line at the height of the gnomon indicates the sunset. The higher curve indicates the course of the sun's shadow at the winter solstice, the lower at the summer solstice and the middle straight line at the equinoxes.