To make a horizontal sundial you
need a gnomon (a pointer with an angle equal to your latitude) and a horizontal scale. You
will also need a compass to set your gnomon and scale so that it lines up with the north-
south line where you are.
The horizontal, scale should look like the one drawn
below. The lines show the hours. This one is correct for a person at 51o N, you will have to
use the table below to draw your own if you live at another latitude.
Hours from noon | 50o (km) |
51o | 52o | 53o | 54o |
0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0o |
Mercury | 4840 | 58 | 0.5 | 87 |