Frederick W. Sawyer, president of the NASS (North American
Sundial society), developed a new type of sundial in 2005. Fred
discovered several new types of sundials in the past, but we
would like to show an example of this latest development. The
basis of the new sundial is a map projection developed in
Germany around 1914, and in the United Kingdom around 1922. The
azimuth of the sun plays a large role here, and thus the newly
developed sundials are based on sun azimuth measurement. Several
possibilities for new sundials were proven and published. Here,
we shall discuss a polar sundial. The figure above shows an
ordinary polar sundial. The dial face is meant for 52 degrees
North, but could be used on other latitudes. It is parallel to
the pole style and aimed towards the south. The hour lines, here
for apparent time, are parallel to each other. A pin-gnomon,
with a height equal to the red line, is square to the dial in
the middle of the XII-hour line. The shadow of the gnomon
terminus is the readout in this s