Work of our members

Summer and Winter Sundial

Groningen

Our member Feike van der Boom made this double horizontal sundial.
The black sundial reads standard time, the lighter daylight saving time; neither taking into account the equation of time.

The hours are indicated by stainless steel balls. The ball for 12 o’clock is bigger.
There are no hour numerals; one counts from the ‘12’ ball.

The gnomon is a bracket, making the pole style well supported.

Interestingly, the black block of granite is purposely made 5 mm higher and 3 mm wider than the lighter block.
This makes the blocks appear to the eye as equally large.