( 117 ) 
an Advantage, he muft call in three more Men to 
perform the VVork.^ If it be anfwer’d, that what is 
loft in Strength,, will be gain’d in Time, it may not 
only be faid, that one cannot always call in more Help 
on the fudden, but that even then, tho’ we fhouldnot 
call this an Inconveniency, yet there will b^ ftill more 
Friftion in this than in the common Method ^ for the 
Roller or Axel will find a Difficulty to wind on the 
Ropes, becaufe they are not perfeftly pliable, and the 
lefs fo, the greater the Weight is that ftretches them. 
This, together with the Fridion of the Collar of the 
Rope of the Counterpoife to the Engine, makes the 
Hindrance greater than in the common Way. Fork 
appears by Experiment, that when the Power is be- 
come equal to 2 ^ to keep the Weight 5* in iEquilibrio, 
there muft be added j (here 4 Penny- weight) to put 
the Power in Motion. 
And to ftiew that this Fridion of the Ropes is not 
always the fame as Monf. Permit fuppofes it ; when 
P (or the Power) is made only one Ounce, and W 
(or the Weight) two Ounces, then to make the Power 
preponderate; only 2 Penny- weight and 18 Grains was 
fufficient. N. B. When P is = 2 and W = y, 
the additional Weight mark’d J was 4 Penny-weight 
and 2 Grains. ' 
It is plain from this, that Monf. PeraulPs Experi- 
ments were very inaccurately made, and therefore not 
to be depended upon. 
