468 Mr, smeaton on Mechanic Power, 
which is nearly half the time that 20 revolutions were 
performed in the firft experiment ; yet, fince the circles 
in which the bodies revolved in the feventh are only of 
half the circumference as thofe of number 1, it is ob- 
vious, that the abfolute velocity acquired by the moving 
bodies in the two cafes is equal. But, by column 6th, 
the time in which it was generated is only half; yet, not- 
withftanding, this will coincide with the former conclu- 
fions, if the intenfity of the impelling power is com- 
pounded therewith ; for, though the barrel was the fame 
with the fame number of turns as in number 1, and 
therefore the lever the fame, by which the impelling 
power acted, yet, as the bodies, upon which this lever was 
to act, were placed upon a lever of only half the length 
from the center, the impelling power, aching by the firft 
lever, would act upon the fecond with double the inten- 
fity, according to the known laws of mechanics; that is, 
it would require a double weight oppofing the bodies, to 
prevent their moving, in order to balance it. An impul- 
five posver, therefore, of double the intenfity, adding for 
half the time, produces the fame effect in generating mo - 
tion, as an impulfive power, of half the intenfity, acting 
for the whole time. 
7thly, The eighth and ninth experiments afford the 
fame deductions and confirmations relative to the feventh 
experiment, that the fifth and fixth do reflecting the 
fourth, and that the fecond and third do reflecting the 
firft; and from the near agreement of the whole, when 
the 
