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air, and nothing can affect the force of motion excepting 
that which produces the law of gravitation, and this law 
under certain circumstances the force of motion can over- 
power and neutralize, as differing undulations in the air or 
ether can be made to neutralize each other. Hence the 
force of motion is independent of any conatus to produce 
gravitation, and of course independent of gravitation itself. 
