rrel, A ; the water tial vacuum in the trunk. In the descending BARKER'S DOUBLE-ACTING FORCING AND LIFTING by the same motion opens the valve, i, of the side of the trunk over the fan, there is a small Figure 1. PUMP. Figure 2. piston, F, and flows through the piston to fill passage through which a… … of piers, breakwaters, mill dams, levels, &c. prevent the admission of air, and it is well &c.The metallic boxes are braced together known that a leak which will not let out wa- by a series of diagonal braces meeting "at "a through which the lower part of the piston This improved pump was patented…
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