Figure the second a side View of the pumps _A_ the pump _B_ the valve which lets the water pass into the body of the pump _C_ the valve which discharges the water by the cock and pipe _D_ by shutting all the cocks and screwing off the top plates which cover the Valves they may be cleaned and put in order though the vessel were under water, Near the pump the plunging anchor _F_ has a cock to stop the water in case the cable should break. _E_ is a screw on which the anchor cap rests while the anchor is up and thus its weight is taken off the cable, Figures the 3d and 4 represent a side and end view of the Cable windlass and the mode of sliding on its axis, Figure the 5th Shews the whole communications of the pump tubes the great water chamber being divided into three parts, it is necessary to drive water out from the middle or either end at pleasure _A A_ the pump seats, _B.B.B.B_ the four valve chambers, _C_ the discharging tube through the bottom, _D_ a tube to draw water from the Balancing chest _E.E_ to draw water from the right and left middle chambers only one of these are necessary as the water communicates by the Kelson to both sides _F_ To draw water from the bow chambers, _G_ To draw water from the stern chambers, _H_ The seat of the plunging Anchor, _Plate the 4th_ Figure the first drawn by a scale of one quarter of an inch to a foot, Shews the incompressible part laid down in the body of a boat, _A_ and _B_ the divisions which form the length of the vessel into three water chambers, with the valve to let the water from the middle chamber to the two ends; but not return; _C_ is a passage for the water from one side to the other. The other figures are of the real size, shewing the modes of constructing the air pipes with cork valves to let in the air and keep out the water; _Plate the 5th real Size_ Figure the first shews the mode of placing the conic glass windows with the stop cocks in case of accidents; Figure the second the lid and cap of the dome; A head taking an observation through a window; this mode of making a window conic renders it as strong as the surrounding brass, _as relates to the pressure of the water_, a stroke only can break them; Figure the third is a Bathomater, to shew the depth under water. _Plate the 6_