The Principles of the Philosophy of the Expansive and Contractive Forces; Or, an Inquiry Into the Principles of Modern Philosophy. That Is, Into the Several Chief Rational Sciences, Which Are Extant. in Seven Books (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1727 Excerpt: ...will Fall into the Air, and the1 other will not Fall into the Water, if less than 3 2 Foot High, as is Experienced. On the other Hand if one Tube is longer than another, and both areFill'd with Water, one Ascending, which is the shortest, and the longest Descending, if it be askt, how the Water in the shortest comics to Ascend Contrary to it's proper Gravity, we Answer, because Fluids do not Act according to their Gravity, but their Pressure or Expansive and Cohtractive Forces, in Fluids of aft eqdal Balance, and therefore the Water in the Bason being Stagnant and in aft equal Balance, that has no Influence upon the shorter Tube of the Siphon, but the Water in the longer Tube Of the Siphon giving way, i. e. Weakening the Balance of the Air below, the Water in the shorter Tube Presses to that Part, where it skids the least Resistence, like Air into an Exhausted Receiver, or which is the fame, the Water Descending in the longer Tube has the Force of an Expansive to that in the shorter, by which it Draws and Attracts it after it by it's Superior Force, and has thereby the Effect of Suction or an Expansive. So Again, if we take this Siphon and Invert it with it's Orifices upwards, and fill it with Water, the shorter Tube will SpoUt out Water, as the longer did in a contrary Position, because the Contractive Force of the Water in the longer Tube now Prevails against the Contractive in the shorter, and therefore has the Force of an Expansive, by which it is Raised into the Air in Spouts or Jetteaus, V. Sturmius's Col-. leg. Curiofum. But Supposing Monsieur Hugens had Prov'd a Pressure of this Subtile Matter from these two Experiments, He is yet far from Solving the present Phaenomenon, because He does not Pretend to give a Reason, why the Force of a Subtile M..