( *86 ) 
1. Let (ii) move forward with two degrees of Ve- 
locity, and (A) follow it with lo degrees ; the re- 
fpec^live Velocity will be 8 as before ; confequently 
by Paragraph icth of this Paper, the Strokes in both 
cafes are equal. The Velocity in (B) after the Stroke 
will be half the Sum of the Velocities before the * 
Stroke, or 6 degrees, by Paragraph 8th. 
According to the new Opinion, the Forces being as 
the Squares of the Velocities, the Force of before 
the Stroke will be to its Force after the Stroke, as the 
Square of x is to the Square of 6 ,* / e. as 4 is to 36. 
Subdudt the Force in (B) before the Stroke, from the 
Force it has alter the Stroke, and you have the De- 
grees of Force communicated by the Stroke : Which, 
if this Opinion were true, would be 31, ^ juft dou- 
ble the Number of Degrees communicated by the 
fame Force in the former Inftance, which was but as 
16. Thus equal Strokes produce unequal Effeds in 
our fenfe of Effeds. 
14. The following Table gives feveral other Inftan- 
ces. In the three firft Columns you have the Veloci- 
ties of the two Bodies both before, and after the Stroke; 
in the two next, you have the Forces in (^B) both be- 
fore, and after the Stroke ; and in the fixth, the Diffe- 
rence of thofe Forces, or the different Degrees of 
Force effeded by the fame Stroke; and in the laft Co- 
lumn, the Proportion of thofe Forces, or Effects of 
the Caufe or Stroke* 
The 
