( 4°J ) 
tages a far greater Power is gain’d from the Strength 
of Horfes, &c. than F>y their going round in a 
Circle; for by the Twill and Acutenefs of the An- 
gles, they draw in towards the Centre, whereby they 
wafte their Power, and alfo ihorten their Levers : 
Befides, their Mufcles and Tendons from their hin- 
der Legs all along their Sides to their Necks are 
unequally {train’d, as the Duty is hardeft on one 
Side, even tho’ their Walk is large. Therefore 
each of thofe Inconveniencies mult be attended 
with Pain to the Animals when at Work, and a 
great Lofs of their Strength. 
idly, A Crank does not rife quite one third of its 
Circle, neither do the Regulators or Rods rile or 
fall perpendicular, but obliquely, by which an oval 
Figure is made by the Pifton’s Motion in every 
Cylidder, which occafions great Fri<ftion and a lols 
of Water, and every Arm of it is continually vary- 
ing in its Power whilft working, as its Lever is 
dillant from the perpendicular Line, and two of 
the Arms (fuppofing it a quadruple one) as they 
crofs the Perpendicular are always drawing to, and 
from their own Centre, by which the Power is 
not only loft, but the Time alfo ; and farther yet, 
by the Ihortnefs of the Strokes, all the adjacent 
Water is frequently contrarily moved, and by the 
often opening; and Ihutting of the Valves, there is 
alfo a great Wafte of the Water, befides the many 
heavy Bearings, Frictions, Surges, and Repairs be- 
longing to it ; all which Inconveniencies and Impedi- 
ments being thoroughly confidered, there muft cer- 
tainly be required a much greater Power to work 
the fame than by my Method. For, hereby, a 
H h h Stroke 
