201 
Steam Engine. 
There are many advantages which a steam-engine on 
this construction possesses, beyond any thing of the kind 
hitherto invented ; a few of which I shall beg leave to enu» 
merate; 
1. It is subject to little or no friction. 
2. It may be erected at a small expence when compar- 
ed with any other sort of steam-engine. 
3. It has every advantage which may be attributed to 
Boulton and Watt’s engines, by condensing out of the 
receiver, either in the penstock or at the level of the water. 
4. Another very great advantage is, that the water in 
the upper part of the pipe^ adjoining the receiver, ac- 
quires a heat by its being in frequent contact with the 
steam, very nearly equal to that of boiling water ; hence 
the receiver is always kept uniformly hot as in the case 
of Boulton and Watty's engines. 
5. A very small stream of water is sufficient to supply 
this engine, (even where there is no fall) for all the water 
raised by it is returned into the reservoir HHH. 
From the foregoing reasons it manifestly appears that 
no kind of steam-engine is so well adapted to give rotato- 
ry motion to machinery of every kind as this. Its form 
is simple, and the materials of which it is composed are 
cheap ; the power is more than equal to any other ma- 
chine of the kind, because there is no deduction to be 
made for friction, except on account of turning the cocks, 
which is but trifling. 
Its great utility is therefore evident in supplying watci" 
for every kind of work performed by a water-wheel, such 
as grist-mills, blast-furnaces, forges, &c. 
* Not being thrown out by a side aperture, as in Plate XVIL 
Vol. I. of our Journal, but merely raised and depressed in the 
pipe f 4 Jour, qto, 545.) 
