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Forrest M. Mims III has an article on using a data logger to record the temperature inside a beehive in the latest Citizen Scientist –

Over the years I’ve done some consulting for the people at Onset Computer Corporation, the makers of Hobo Data Loggers and various related products. Consequently, I’ve accumulated a nice collection of wonderful little data loggers that I put to work whenever an opportunity arises. The result has ranged from learning the temperature inside a doghouse on a cold winter night to discovering that cumulus clouds can increase solar ultraviolet radiation on the ground by as much as 20 percent, a finding that became a short paper in a major science journal (F. M. Mims III and John E. Frederick, Cumulus Clouds and UV-B, Nature 371, 291, 1994).

The Citizen Scientist – Link.