Publisher's Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1745 edition. Excerpt: ... x notat. Phenomenon, and that this Action of Bodies upon one another, by means Lect. V. of Instruments, must be call'd Pressure, distinguishing between Force and v----v----' Prejfure, allowing Pressures of Powers to be to one another reciprocally as the Mafles multiplied into the Velocities v but denying that Forces are: in that Ratio. Now to shew that Forces, which we also call the Momenta of Bodies, are in the Ratio above-mentioned, let us impartially consider the following Experiment communicated first to me by Mr. George Graham. The Machine represented by the Figure has been already describ'd' {Edge 300, ) only we must suppose the Arc FE to be divided into 24 Degrees on each Side, counting from the Edges A D and C B of the flat square Pendulum, instead of 18 mark'd in the Figure j and that the Pendulum weighs 2 Pounds, and the Weight "W also two Pounds.. Now, if the Pendukim without the Weight W, be drawn up to the 24th Degree on the Side of E, when you let it go, it will rife to 24 on the* other Side; but if a Person, who holds the String L in his Hand (whilst the Weight W hangs half an Inch above A B C D, when at the lowestPlace) lets go the String just at the moment that the flat Pendulum comes to the lowest Place, the Pendulum receiving thereby an Addition of Matterequal to its own, goes only to 12 on the Side of F. If we let the Pendulum fall from 20 Degrees, and W be let down upon it at the lowestPart of the Vibration, then it will (thus loaded) go but to 10 Degrees i, and when you let it go from 12, if it receives the Weight W at bottom, it will go but to 6. Now to compare together the two Opinions, we must examine, which of.' them gives the Momentum the fame before and after the Reception of W. Ol D O P I N I O Ni New Opinion....
