( ^3 ) 
give to the fame falling Body Degrees of force pro- 
portional to the height from whence it falls ; accord- 
ing to his Opinion, by the power of Gravity, equal 
Degrees of force are added in the defcenc of the 
fame Body through equal Spaces , and in different 
Bodies defcending through equal Spaces, the Degrees 
of force added will be as the quantity of Matter, or as 
the weight of each Body. Therefore while the Globes 
A and B penetrate equal nafcent Spaces into the yield- 
ing Subfiance, by the Adion of Gravity, were nor that 
Adion overcome by the Refiflance of that Siibflance, 
additional Degrees of force would be communicated 
in fuch proportion, that the force added to the Globe 
A^ would be to the force added to the Globe as 
the weight of the Globe A, to the weight of the 
Globe B, or in the Duplicate ratio of the Velocity 
of the Globe B, to the Velocity of the’ Globe A. 
But fince the Globes lofe the fame Degrees of force 
in entring equal Nafcent Spaces into the yielding Sub- 
fiance, the Efted: of the Oppofition made by this 
Subfiance to the Motion of the Globes, during the 
time of their paffing through fuch Nafcent Spaces, will 
be both the taking from them that fame Degree 
of force, and moreover the additional force, which 
would otherwife have been given them by their 
own Gravity. But farther, the Oppolitioni made to 
the motion of the Globe to the Oppofition 
made to the motion of the Globe B, will be in the 
ratio compounded of the ratio of the Effed of the 
Oppoftion, the Subfiance makes to the motion of 
the Globe to the Effed of the Oppofition, the Sub- 
fiance makes to the motion of the Globe B, and of 
the ratio of the Time, in which the Oppofition is 
made againfl the latter Globe, to the Time in which 
it is made againfl the former ; which latter r<itio is the . 
fame 
