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[paradox V] PARADOX V. That the Pressure of an external fluid, is able to keep an Heterogeneous Liquor suspended at the same height in several Pipes, tho' those Pipes be of very different Diameters.
This is evident from what is represented in Fig. 6. Plate the second,* 1.1 for if the Orifice of that Vessel A B C D be closed up with a Cork, and that Cork have four holes, in three of which the Pipes are fixed, and in the fourth the Tun∣nel, and if, when so much Water hath been poured in as reaches to the Surface E F, Oyl be poured through the Tunnel till it reaches to the Surface G H it will depress the Surface of the Water down lower, and the Oyl not being able to get into the Pipes L. M. N. by its weight, it will cause the Water to rise to O P Q, the Surface of the Water, which before rested at E F, being depressed down to I K, upon which imaginary Surface the Water contained in the Tubes, answerable to their Bulk, making an e∣quivalent Pressure with a Cylinder of external Oyl of the same Bore, the Water must conse∣quently be buoyed up to the same height in all, except the last Pipe be very small, but the dif∣ference on that account being easily distinguish∣ed, it will be no difficult matter to make an al∣lowance.
N. B. when the Oyl is poured through the Tunnel, it will be requisite to put some Cotton Wool in it, to break the force of the falling