Mr . s me at on on Mechanic Power . 
465 
OBSERVATIONS AND DEDUCTIONS FROM THE PRECEDING 
EXPERIMENTS. 
i ft, By the firft experiment it appears, that the me- 
chanic power employed, confuting of 8 ounces in the 
fc:v deliberately defcending (by 5 turns of the bigger 
barrel) through a perpendicular fpace 2 51 inches, will 
reprefen t the quantity of mechanic power which caufes 
the two heavy bodies, from a Bate of reft, to acquire a 
velocity, fuch as to carry them equably through 20 cir- 
cumfeiences of their circle of revolution in the fpace of 
29 j and that tne time in which the mechanic power 
produced this effedi was 14"^, as appears by column 6th. 
And this mechanic power we fliall exprefs by the num- 
ber 202, the product of the number of ounces in the 
fcale multiplied by the inches in its perpendicular defcent, 
for 8 x 25^=202. 
2d, By the fecond experiment, as 10 turns of the 
fmaller barrel are equal to the fame perpendicular height 
as 5 turns of the bigger, it follows, that the fame me- 
chanic power, viz. 202, adiing upon the fame heavy 
bodies to accelci ate them, produces the verv fame effedt 
in generating motion in the bodies as it did before, viz. 
20 revolutions in 29^, the fmall difference of 1 of a fe- 
cond being no more than may reafonably be attributed to 
the unavoidable errors ariling from fridlion of the ma- 
chine, want of perfedt accuracy in its meafures, refiftance 
of the air, and imperfecfions in the obfervations them- 
felves, which muff not only be allowed for in this, but 
2 the 
