On Thu, 4 Aug 2005 20:46:07 +0000 (UTC), "Mike Dworetsky"
wrote:

"R.H." wrote in message
...
This week's set has been posted:

http://puzzlephotos.blogspot.com/

422. Chinese (or Japanese?) portable sundial. Remove from pocket; unfold,
set the elevation angle of the pointer (gnomon) to the latitude of the user
(by city, perhaps), use the compass to rotate so North is correctly
oriented, then tell the time of day if the Sun is shining. I haven't quite
worked out why there are two foldups; perhaps one side is for summer and the
other side is for winter, when the shadow on the other side is not seen?

Silly, the other side is for daylight saving time :-)





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If you're gonna be dumb, you better be tough

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