clofed on every fide, and divided into two rooms by the 
floor EF. 
GLMH, is another Cylindrical Veffel within that 
upper room, cemented with its mouth downwards to 
the floor, and full of water up to the furface IIQ, the 
upper part thereof G //(^/7, being full of Air. 
i^P two Pipes, open above and below, and let 
throughthe upper room into this Veffel, and reaching 
almoft down to the floor E F. 
a Pipe open above and below, and let into the 
upper room. Tht fe Pipes mufl be clofe joyned round 
about them to the floors CD, and G H, 
X,T, two little hemilpherical bladders.prepared with 
Oyl or fome Oyly fubftance (as Butter or Turpentine) 
againfl: water, and cemented with their Mouths upward 
to the floor EF underneath, 
ce, /3 two valves opening out of the upper room into 
the bladders. 
y,A two other valves opening out of the bladders in- 
to the inner Veffel above. 
A"".^ a pendulum playing upon the center iV, and hav- 
ing two battledoor arms a b to fqueez alternately the 
bladders which refl upon them. 
Let the 'upper room be filled with water at the Pipe 
VJV, and if the pendulum be made to play by Clock- 
work, the bladders will perpetually pump it thence into 
the inner Veffel, and the compreft Air G in the 
upper part of that Veflel, preffing upon the furface of 
the water //(^, will force it thence into the Pipes O ^ 
i? out of which fpouting with a perpetual even flreani 
into the fpoons S, T, it will run down by the Pipe JVV, 
into the upper room again. The pendulum will play 
mofl eafily when the upper room is filled to the top of 
the Pipe ^'U. Inflead of the bladders mav be. other con- 
trivances, as of fuckers or little Organ bellows, playing 
alternately with two leaves about an axis in the middle, 
Sept. 1(5. idgy. Tenon. T t t Eclipjis 
