You can use a ping pong ball...
http://www.uen.org/Lessonplan/preview?LPid=2454
or an anemometer ... they are reasonably priced but the software to translate and post real time readings to an infield screen might be expensive .
http://www.weathershop.com/davis_anemometer.htm
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Tom Cooley photo
Last edited by richard : 09-05-2010 at 07:28 PM.
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