Aeolipyle, Or Aeolipile ( the gate of Aeoius; or, more probably, Aeolipila, the ball of Aeolus), a hollow metallic ball, containing a curved tube connected with a small orifice, and sometimes two such tubes turning in opposite directions. Water or alcohol being introduced in it and boiled, it was used in old times to exemplify the force of steam, or as a blowpipe.when adjusted to a lamp. In 1G15 Salomon de Caus noticed in using it the effect of steam in causing water, by the assistance of heat, to mount above its level. This machine was intended to discover the cause of the winds.