Word: hummers
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Dates: during 1932-1932
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...this being true, Dr. Thomson proposes: "To organize an electro-magnetic 'hummer' which, at small expense of energy, can spread over a large space the peculiar hum, and attract the males; perhaps also repelling the females. Various ways of trapping the males may be suggested, as they need not be desiccated or cooked to get rid of them...