Theatrum naturae et artis

remains outside, and thus the flow, once begun, is continued: in a full cup scyphus, to which such a siphon tube for transferring liquids has been applied, pouring out the liquid through the bottom, not retaining the same when full: in an interrupted inverted siphon performing the same: in a swan, and other birds sucking water from a basin.

To this also pertains that mode of drawing water from common fountains through pipes, whether leaden or wooden: concerning which we show how many types of valves (commonly called "ventile") can be inserted into them. We have observed, however, that the most useful among them is that which is equipped with only small balls, either of stone or lead. To these is submitted a small machine, equipped with leaden pipes, by which a small boy can lift water or wine into any part of the house from the cellar or elsewhere without any difficulty.

Of this place also it is to treat of machines and pipes, by which water is ejected to extinguish fire. We show some specimen of such a thing, which ejects water without intermission, even when the man agitating the piston ceases for a time.

The third principle is the pressure of air (a) either rushing in spontaneously, (b) or thrust in by a syringe, (c) or by the falling