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Scientific American, Vol. 55, No. 5 (1886) (1886)

leaf 3

An illustration from Scientific American, Vol. 55, No. 5 (1886), 1886, leaf 3
, which The instrument has as its main feature a thin flat porting frame, and carries the arms, KE, which, as the is normally held in front of the groove by a spring. plate of springy German silver, which is 75 Springs are provided for lessening the shock and noise centimeters in length by 2… … required to bring the weight from the bal- anced position to the level position. Accord- . FRAZURE’S CHECK ROW CORN PLANTER. ing to Sir William Thomson, such an appar- atus as he has constructed is sensible to a forty-thou- under side of the upper cross bar of the frame when shaft revolves, strike…

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