Year 2007

Sundial of the month August

Terella sundial

In The Hague, there is an old shadow globe sundial.
Its history is unknown but its age is probably respectable, in view of the spelling ‘Noort Pool’ instead of Noordpool.
The ‘Leeuwen fecit’ inscription gives us the name of the maker, but that is about all we know.

zw-07-08-01.jpg

In the zenith of the globe is a long, vertical rod, which might have supported a wind vane.

In the north and south poles are holes. Here, there would have been pole styles for the circular sundials there. The photograph shows the one on the north pole.

A horizontal circle divides the globe into two parts.

The main item is the hour and date line pattern on both sides of the equator.
The 12-hour line is on the west side and on the east side: the sundial is read where the terminator intersects the equator. There is no rotating vain to aim at the sun.
The date lines have no function other than to embellish the sundial.

Overall, it is a beautiful old sundial but unfortunately, the maker obviously made a mistake.
In The Hague, the angle between the axis of the earth and the horizon is 52 degrees, but in the sundial, that angle is the complement, or 38 degrees.
This would make it more suitable for a location such as Lisbon, Portugal.

Fer de Vries

Adres: Den Haag, Kwekerijweg 2.

English translation: RH