An Account of Some Experiments Made to Prove, That the Force of Moving Bodies is Proportionable to Their Velocities: (Or Rather That the Momentum of Moving Bodies is to be Found by Multiplying the Masses into the Velocities) In Answer to Such Who Have Sometime Ago Affirm'd, That That Force is Proportionable to the Square of the Velocity, and to Those Who Still Defend the Same Opinion. By the Reverend John Theophilus Desaguliers, LL. D. F.R.S.