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Scientific American, Vol. 29, No. 6 (1873) (1873)

leaf 7

An illustration from Scientific American, Vol. 29, No. 6 (1873), 1873, leaf 7
lance till the lever headed bolts, which, we are informed, cannot be made on wheel, A,of four or more paddles and a screw are attached, B. floats clear of the valve spindle; the number of pounds in- machines where the bolt is turned to receive the action of The screw, driven by the wind wheel,… … adjusting the. end screw. The inventor statesthatactu- The driving wheel is in op- make at least from 500 to 600 revolutions in a minute; and be a simple and easily accessible device. bolt. The long slide carries the bottom die on its lower end. consequently three ventilators, of 8inchesdiameter of…

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