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Scientific American, Vol. 16, No. 24 (1867) (1867)

leaf 3

An illustration from Scientific American, Vol. 16, No. 24 (1867), 1867, leaf 3
the adjoining A correspondent in Braintree, Mass., who is well informed where recesses are made in the posts or bars the bedbug is State of New Hampshire, and will doubtless operate power- Tt will. sure to ensconce himself, even if the crack through which he fully there also upon the progress and… … it resembles an ordinary key plate, except that it ments are turned to the same diameter as has a slot cut from one side on a radius struck from the center the inside of the rim of the pulley, A. of its pivot. To one side of the key-plate, beneath the slot, is The two levers, E E, are connected to…

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