- Apidictor
An apidictor is an instrument which measures and records the sound in a beehive. The instrument records the aggregate sound made by the buzzing of the bees' wings. They were thought to be useful for predicting when a colony is preparing to swarm.
E.F. Wood invented and patented the apidictor in 1964. Only 300 are reported to have been sold.
External links
* [http://www.beesource.com/plans/apidictor.htm Apidictors]
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