C r 57 ] 
therefore the velocity of the pevet g, to the velocity 
of the pevet h, is And as it appears that the 
velocity of the power in the wheel A, is in a ratio of 
* V ° to the velocity of the pevet g ; confequently its 
velocity to that of the pevet h, is 1 / ° x 9 —=: z ° 7 _ 3 6 ° . 
So that T?T ‘ T ^ of 13,250 pound the quantity of 
weight deemed equal to the friction originally in the 
pevets / or a power E fomewhat more than 2 ounces, 
will be lufficient to overcome the fridion in the 
pevets h. 
Thus it is evident, that, by the application of addi- 
tional wheels, or by enlarging the diameters of 
thefe, the refiftance from fridion may be reduced 
to lefs than the refiftance of the medium the wheel 
paffes through. 
The whole weight which centers in the axis of the 
wheel A, being equally divided on the pevets f and 
further fubdivided on 32 pevets h 3 the weight on 
each of thefe pevets, being but _V of the weight on 
each of the pevets/, does not require more than of 
its ftrength. And as the quantity of fridion in each 
of the pevets h is in proportion to the weight or pref- 
iure it bears, tne fum of the feveral quantities of fric- 
tion in the 32 pevets h 3 is equal to the quantity of 
fridion that was originally in the 2 pevets f in pro- 
portion to their velocities. 
1 here is alio lome additional fridion in the pevets h 3 
on account of the weight of the wheels G and H; but, 
with refped to the power in the wheel A, it is not of 
confequence'to require a calculation. 
There is no engine for railing heavy weights, that 
lias lefs fridion than the axis in peritrochio. If the 
fame weight were to be raifed by 2 wheels, one mul- 
X 2 tiplying 
