General Description. 171

K. Fly-wheel shaft, working in a plummer-blockon the wall.

L. Coupling-box, connecting the engine withthe fly-wheel shaft.

M. The fly-wheel.

NN. Two excentric wheels, supported by thecrank-shaft K, the action of which give motion tothe two beams O and T, by means of the connect-ing-rods PP.

O. The beam which works the cold-waterpump S.

PP. Two connecting-rods.

Q. The double bearing, on which the cold-water pump-beam works.

R. A rod which serves to connect the bucketof the cold-water pump with the beam O.

S. The barrel of the cold-water pump.

T. Beam which works the air and hot-waterpumps, and to which motion is communicated bythe connecting-rods P, as before described.

t

U. The slings which connect the air-pump rodto the end of the beam T.

V- The double bearing, or centre, on which theair-pump beam T works.

W. The air-pump bucket.

X. Air-pump cylinder.

Y. Hot-water pump, worked by a small rod,attached to the air-pump beam.

Z. Feed-pipe, to supply the boiler with hotwater.