XK ntific VOLUME XIL NUMBER 14. which the driver—consisting of a flat plate THE Scientific American, with a cylinder like the above—works di- … road routes and cost of mail service thereon, Improved Steam Pump. arm strikes one of the tappets on the valve years’ wanderings in the wilds of Southwest- at the end of each fiscal year from 1852 to The accompanying figures represent the rod, it causes the valve driver plate to slide a ern Africa,…
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