The Ingenious and Curious Pneumatic Motions of Hero

ticles, they go to the bottom of the vessel: which makes us clearly understand that there are vacua in the water. We see besides this wine poured into water going through it according to the effusion: which would not happen if there were no vacua in the water; and lights are carried one through the other; for if we light more lights they will illuminate everything more greatly in the same way, passing and penetrating one through the other interchangeably. But for copper, and for iron, and for all other bodies, such penetration is made in the very way that happens in the torpedo electric ray fish of the sea. But because we have demonstrated that a collected vacuum is against nature, and by the light vessel placed against the mouth, or by the Medical Egg, and since it seems to us that there are many demonstrations of the nature of the vacuum explained by us, we have thought we have said enough of this, being that we have demonstrated it through sensible demonstrations. Let it therefore be generally permitted to say that every body is composed of light and small bodies, in which, or among which, there are small vacua disseminated in particles; and that we abuse ourselves when we say that nothing of a vacuum is found, if it is not violated by some violence; but that every thing is full, either of air, or of water, or of some other substance, and as much as is lacking of one of these, that much there is of the other, which fills the place. We say furthermore that no vacuum naturally collected or amassed exists if it is not violated by some violence, and again that no vacuum is found at all if not outside of nature. And since we have explained these, it is time now to begin to describe the Theorems that are made by means of the battles of the above-mentioned Elements, for by means of these are found various and marvelous motions, which, first considered as Elements, we will reason about the bent siphons, they being most useful for many Spiritual In this context, referring to devices moved by air, steam, or water pressure. things.

A decorative typographical ornament consists of several rows of floral and foliate fleurons, arranged in a centered, tapering inverted triangular shape.