...half the pressure on au equal surface at the bottom XR ; which pressure (by Prop I. and III ) is equal to the weight of a column of water whose base is the surface ZC^, and whose height is the depth of the stream. Therefore the pressure against the surface...

...contraction, by requiring an augmentation of velocity, employs a part of the impelling force precisely equal to the weight of a column of water whose base is the contracted passage, and whose height is the fall which would produce a velocity equal to this augmentation....

...ascending tube : and by repeating the operation may be raised to the required altitude. The pressure upon the piston is equal to the weight of a column of water whose base is equal to that of the piston, and altitude the distance of the surface of the water in the ascending...

...same time. PROP. 4. — The force oj a stream of watir against any plane obstacle at rest, is equal to the weight of a column of water, whose base is the section of the stream ; and height the space destended through by a falling body, to acquire that velocity. For let...

...the fluid against the plane. 2s Cor. \ . The force of a stream of water against any plane, is eyual to the weight of a column of water, whose base is the section of the stream, and height !!£. ; or the height of the water, if it flow 2s through a hole at the bottom of...

...object in the absence of any horizontal motion ! Nor is it hydrostatic pressure, which pressure is equal to the weight of a column of water whose base is the surface pressed, &c.; this pressure is that sustained by dock gates with a head of water on one side...

...smaller, or larger, than the cylinder GH, the body of water supported by the workman is always equal to the weight of a column of water whose base is the surface of the piston Б, and depth the distance £ F above the surface of) the water In the well....

...Hydrostatics.) Hence it appears, that the pressure exerted by the water in PV on the lower surface of the piston is equal to the weight of a column of water whose base is equal to the section of the piston, and whose height is M N. This, therefore, is the force to be overcome...

...at each stroke to lift the piston. The quantity of water discharged at •.vcli stroke, is equal to a column of water, whose base is the section of the piston, and whose altitude is the length of the stroke. This quantity may, therefore, be found in cubic feet> by multiplying...

...(Art. 456.) Hence it appears, that the pressure exerted by the water in PV on the lower surface of the piston is equal to the weight of a column of water whose base is equal to the section of the piston, and whose height is MN. This, therefore, is the force to be overcome...