It seems reasonably well established that the oldest extant sundials are
from ~1500 BC in Egypt, but I recently came across the following statement
in the popular book "Timekeeping" by Rodney Dale (1992):
"Shadow boards are still used in Upper Egypt for measuring the time taken
to perform tasks, or for timing the distribution of water for irrigation. A
water clock is used to mark the movement of the shadow."
(1) Regarding the first sentence, is this correct? Can anyone cite some
other source of information on this practice today?
(2) What does the second sentence mean?!
Many thanks.
- Woody Sullivan
******************************************************************
Prof. Woodruff T. Sullivan, III [EMAIL PROTECTED]
Dept. of Astronomy, Box 351580 tel. 206-543-7773
Univ. of Washington fax 206-685-0403
Seattle, WA 98195 USA
