Make your Own Dial – Part I. D. 1. Draw two perpendicular lines AB, and CD. Where they intersect is O, the origin 2. Draw CB’ from C, using your latitude as the angle between CB’ and CD. 3. Draw a line from the origin O, (where AB and CD
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1. Draw two perpendicular lines AB, and CD.
Where they intersect is O, the origin
2. Draw CB’ from C, using your latitude as the
angle between CB’ and CD.
3. Draw a line from the origin O, (where AB and CD
cross) perpendicular to CB’. Call this line OP
7. Starting from O, mark every 15 degrees
around the edge of the circle
8. Draw lines from N through these circle points
until they meet line AB. These are the hour
9. Connect point C with each of the hour lines,
meeting them across line AB
10. Label the lines from C, starting with line CD
as 12 pm. The lines will span the time from
7 am to 5 pm
11. To finish, draw a line parallel to AB through
point C and label the ends as 6 am (left) and
6 pm (right)
CMake your Own Dial – Part IV
CMake your Own Dial – Part V
12. Draw a triangle gnomon. The acute angle
is equal to the latitude.
13. The high side of the triangle may be
artistically curved to a pleasing shape
14. The gnomon goes onto the dial face on
the C to 12 line, with the gnomon’s acute
point placed at C. The dial C to 12 line
is pointed north. Then the hypotenuse of
the gnomon will be parallel to the earth’s
axis of rotation.