rrel, B, to fill the by a fan beneath one side, which forms a par- vacuum produced in the barrel, 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… … by a series of diagonal braces meeting "at "a through which the lower part of the piston This improved pump was patented by the ter enough to injure the action of the pump point about the centre of the box and connect- rod,/, passes tightly. In the upper section, inventor, A. Barker, on the 17th of…
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