Water-raising pumps and a water-pressure gauge
A pump driven by a water-wheel; a counterweight balancing 25 against 1,000 pounds
Under the heading 'device for water,' the upper drawing shows a pump driven by a water-wheel to raise water, with a note that a second pump can be worked by a cord as well as by a toothed wheel. Below, an apparatus for measuring hydraulic or pneumatic pressure balances water through a spout fitted with a small clapper-valve at its mouth a: the water between M and n is reckoned at 25 pounds while the counterweighting water is 1,000 pounds. Letter-labels a, M, S and n key the diagram.
On this page
Pump driven by a water-wheel to raise water
A crank and gearing turn a paddle-wheel fed by an inclined chute, driving a pump for raising water.
Pump worked by cord or toothed wheel
A note on a second pump states it does the same and can be driven by a cord as well as by a toothed wheel.
Water-pressure gauge with counterweight (a, M, S, n)
A beam apparatus with a spout carries a little clapper-valve at its mouth a and a hanging weight S. The water between M and n is set at 25 pounds while the counterweighting water is 1,000 pounds.