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Scientific American, Vol. 27, No. 3 (1872) (1872)

leaf 7

An illustration from Scientific American, Vol. 27, No. 3 (1872), 1872, leaf 7
with lap joints, possess that of cheapness. The ellip- Here a separate base is secured to the body of the rail by a pair of wheels. Only the upright shaft and hand wheelare tic top may go with either construction. The inventor states shown in the engraving, the other portions of the brake be- lap… … unless it has a polariscope attached to it. running, in all, two yearsin good order. It CANFIELD’S RAILROAD CAR BRAKE. The polarization of light may be em- appears to be durable, and costs only an in- significant sum to keep in order. For further information, says the British Jowrna! of…

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