164 Steam-Engine—Physics, §¢. 
The power is communicated to its object from the 
side of the frame by the axis attached thereto, and 
on bearings. ‘This axis (i?) may be of any length ; 
minate in a crank or cog-wheel, or another cylinder (as here re- 
presented) may be attached thereto at right angles to the first, 
to co-operate and produce, at every moment, equal power. 
Plate Il. Fig. 6. Profile of the above. aa, = 
valve; deg, cylinder and frame ; f, valve; hh " 
2, cog-wheels to move the pumps; kk, nme mo 
erings in; 0 0, gas- -fire flue. 
Fig. 1. a, steam-pipe; 6, escape-pipe ; ¢, fixed val 
moving valve; e, axis; f, a washer; g, section of fram 
washer; i, centre-piece; //, steam-pipe; / k, springs to! 
the valves together. Ba 
The canal-boat has her wheel in the stern. (See Pia’ 
The motion is given by a cog-wheel upon its axis (g) 
upon by wslother, upon a shaft, at right angles, to which the 
gine communicates motion. The wheel being i 
this shaft, and fur the support of its esd. ay oe 
Fi ig. 3, ee rice the — of the machinery oe? 
of others at such rate as may be proper on canals. 
boilers ; ¢, tar-vessel ; d, the cylinder; f, water-wheel- 
The supply of water to the boilers is either by a pumps 
usual form, .or by the supply-chamber of my invention, (7 
{L. Fig. 2.) which consists simply of a pipe having two stip 
cocks, one end in a reservoir, the other opening into te ol 
er at top, sloping downward for a foot or two. ‘The cocks’ 
in the sloping point. The operation commences, DY °F 
ing the cock nearest the boiler, the steam drives the air 
of the pipe through the water into the reservoir shat © 
cock, and the water rises from the reservoir to fill 
t it is not necessary (as in the plate) to crowd the ens 
ea ait of the boat ; the dees may be placed forwar 
ver them, the eylinde The power is then communi 
stern-wheel by a long tai ee ‘ppo orted on, or immenee 
This ery nt gives room loading both 
behind and 
ers and engine, and ——e re bade This is the actual rm 
of the Merrimack boa 
