The Ingenious and Curious Pneumatic Motions of Hero

vent, which, when stopped with a finger and the vessel then filled with water, the water will remain above the diaphragma partition/diaphragm or diameter, being unable to descend to the bottom because the air within it has no other place from which to escape and give it space, except for the vent K. & H. As soon as this is opened, the water will immediately descend through the sieve to the bottom of the vessel. Therefore, if we first place wine in the vessel, then close the vent K., and subsequently fill the vessel with water, it will not mix with the wine. But when pouring from the vessel, only pure water will come out while vent K. remains closed. Then, having closed the aperture H. & opened the vent K., only the wine will come out through the mouth of the vessel, to which the mouth of the pipe will arrive at the same level as the mouth of the vessel. And by opening both, both wine & water will come out. This makes it clear that from this vessel, at our will, we shall pour water & wine, or wine alone, or pure water, whenever it pleases us to play a trick on our friends. This vessel shall be constructed as seen in the above figure.

ON THE SPHERE, OR CONCAVE BALL,

which pushes water upwards by itself. Theorem IX.

A technical diagram of a pneumatic or hydraulic device. It features a spherical glass or metal vessel (A-B) mounted on an ornate pedestal. A funnel-like opening at the top (S) leads into the sphere. Internal piping and valves are labeled with letters (H, K, L, M, N, X, P, T, Y, F, G). The device appears designed to use air pressure to move liquids.

A concave sphere, or other vessel, is also manufactured from which the water poured into it pours itself out and rises by its own force with great vigor until all has exited against its nature, in this manner: that is, let the sphere A.B. be of whatever material is most suitable, provided its body is firm and constructed of sufficiently good material to resist the great force of the future compression of the air. The diameter or width of the body shall be made according to the wish of the one who wants it, whether large, medium, or small. This, placed upon a pedestal, that is, foot C., shall be perforated at the top part; and in this hole, place a perforated pipe, set at such a distance with its inner mouth from the point diametrically opposite to said hole as your judgment deems sufficient for the flow of water. And you shall raise the pipe above the ball somewhat, very diligently soldering it around the hole so that air can neither enter nor escape. Afterward, this pipe shall be divided into two tubes D.G.D.F. in which two other transverse tubes H.K.L.M.N.X. are fitted, perforated and holed together with the two D.G.D.F. Then, into the tubes H.K.L.M.N.X., another tube O.P. shall be inserted, likewise holed to match the holes that are in H.K.L.M.N.X., and this shall have the opposite