Labs from YSI 94 :
Individual Horizontal Sundial 2 (Cloud/Rain Activity).

This is a lab and a Teacher's Guide that's missing a graphic.

This sundial will work best at 42 1/2° latitude, the latitude of Yerkes Observatory.

Materials

Directions

1. Glue the sundial and gnomon pieces to a sheet of thin cardboard. Let dry.
2. Cut out the sundial and the gnomon carefully.
3. Glue the gnomon to the sundial on the 12:00 Noon line, matching points (a) and (b).
4. Set the sundial up outside or in a sunny window level to the ground. Point the Noon line and the gnomon directly North. Adjust the sundial by comparing the time you see on the dial with the time on a clock and turning the sundial until the times most nearly match.
5. If you measure the time at different times of the year, how accurate will your sundial be?

Remember:

For more information about sundials, try these titles:
Sundials, Their Theory and Construction by Albert E. Waugh
Sundials by Roy K. Marshall

Important Disclaimers and Caveats:

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