Work of our members

A hardstone pedestal supports the horizontal part of this stainless steel sundial in three places.
Setscrews facilitate the levelling adjustment.
This will also align the upright part of the dial vertically.
Of course, the proper north-south direction should be observed as well.

The vertical plate carries hour lines and hour points for apparent solar time.
Because it is not easy to read a shadow on stainless steel, glued-on plastic strips improve the readout.

The user converts the indicated apparent solar time to clock time using longitude correction and the Equation of Time.
The first of these is fixed, the second is determined using a special device.
This semicircular scale rotates together with the gnomon. This is the function of the knob on the bottom of the style.
The style bears an indicator rod enabling one to read the declination (and so the date) by turning the style and the scale into the direction of the sun.
A figure-of-eight loop, indicating the value for the equation of time, is drawn on the date scale.
The sundial user, then, actually has to operate the sundial and make a calculation to arrive at civil clock time.

The sundial is at Bergweg 23, Markelo.

Leen van der Neut.