that it ever made, with the fame, or rather a fmaller 
quantity of fuel; and muff therefore difcharge 4 
more water in equal time ; which confequently faves 
4 of the fuel. But the effedt is found ftill greater, 
as to fupplying the tenants with water ; for the en- 
gine performs the fame fervice better now in 5 hours, 
than ever it did before in fix : which can only be 
accounted for, by the extraordinary regularity of its 
ffroke, which does not abate of it’s full length fud- 
denly, as it ufed to do, when the ftrength of the 
fire abated : this I take to be occafioned in a great 
meafure, from placing the axis above the leaver, by 
which the center of gravity becomes reverfed to 
what it was before ; fo that it requires the fame 
power to keep the end of the leaver depreffed as low 
as the fprings, that it required before to bring it back, 
when fo much depreffed ; which is a particular be- 
nefit ; for the ffop, or fett, generally in large engines, 
when the ends of the leaver come to the fprings, is 
a defedt that has been endeavoured to be remedied 
in fome degree, by the help of the fprings. But 
when the axis is placed above the leaver, and the 
fridtion reduced, as in fig. 4, if one end is brought 
down to the fprings, and let to return, it carries the 
other end down to the fprings without any affiftance, 
and will continue to do fo feveral times, abating 
fomewhat of the length of the ffroke, each time. 
This engine, from feveral improvements that have 
been made in the boyler, confumes but 4 bufhels of 
coals in an hour; which is deemed 4 lefs than others 
of equal bignefs ; and it performs the fame work 
now in 20 hours, that it did before in 24 hours, it 
is a faving, in effedt, of 16 bufhels in 24 hours, a- 
4 mounting 
