Steam-Engine—-Physics, &c. ; 163 
which ich I mention merely in reference to the supposed utility 
- of this mode of operation, in connexion with Morey’s engine. 
-Morey’s engine should rather be denominated a revolving 
engine than a rotatory one, especially as it is essentially differ- 
ent from one so called invented by Mr. Curtis. 
Plate 1.* Fig. 5, represents the arrangement of a double en- 
4 ine for a boat, with its cylinders in different positions. aaa, 
boilers; 6d, tar-vessel 3 ¢, valve-box ; d, cylinders in different 
positions; e, piston-rod ; f, pitman; A, centre-piece ; 7i, shaft; 
k, valve; J, steam-pipe ; mt, escape-pipe ; n, condensers ; ¢, wa- 
ter-wheel ; v, face of the valves; 2, tar-fire. The frame, hold- 
ing the cylinder (d) is, by its opposite sides, so hung as to re- 
Yolve. To the end of the axis of one side, extended over the 
cylinder, is fixed the centre-piece (/) resembling a crank, from 
which the bar or pitman (/) communicates to the cross-piece 
of the piston-rod. On this same axis, but outside the frame, are 
ced two circular pieces, one of brass, the other of iron, (k) 
which we may call the valves. One is fixed on the axis, the 
other moves, and accompanies the frame and cylinder in its 
revolution; from it, at opposite sides, pipes lead the steam to 
each end of the cylinder. It has a smooth face, which applies, 
and is kept by springs close to that of its counterpart fixed on 
= id axis, Steam-pipes lead from the boilers through the 
counterpart into the moving valve. On the opposite side of the 
fixed piece the eduction-pipe (0 0) leads to the condensers. 
The condensers (p) are upright vessels, two to each cylinder, 
connected at top by a sliding valve box, so that the steam enters 
them alternately. At bottom are two valves, kept closed by 
Weights, A stream of water is injected into the condensers, 
Which escapes by the bottom valves (p p) by which also the air 
4 blown out, at every stroke, in the same manner the engine 
'S cleared of air at first. 
re are also two cocks and cross-pipes seen, Plate III. 
'S 4, to change the steam from one side to the other of the 
valve, to give a reversed motion of the engine. 
seri » Vol. IL.) with finished and beautiful drawings, (p. 176,) whose de- 
inthe” ‘Seen on p. 112—13, it appeared supe t ; 
ed jn econd edition of the second number, the skeiches which were insert- 
© frst edition. B.S. * 
