John Bate, in his “Mysteries of Art and Nature,” 1635, 4to. has “a conceited lamp, for forcing water or air through the figure of a bird.” A minute description is given for constructing a small boiler in the form of a crown, surmounted by a bird, and enclosing various perforated pipes and valves, capable of being turned in various directions; the whole is set over a circular lamp, with several cotton wicks. Water being put in the boiler, Bate observes--“Then the water being by little and little converted into ayre, by the heate of the lights that are underneath, will breathe forth at the mouth of the cock;” but, on being partially turned, “then there being no vent for the ayre to breath out at, it will presse the water, and force it to ascend the pipe, and issue out where the air breathed before.” In conclusion he shrewdly remarks:--“_Other devices and those more strange in their effects, may be contrived from hence_.” (p. 33, 34.) In the “Recreation Mathematique” of H. van Etten, 1629, 12mo. of which there were translations in several editions, as 1633, 1653, and others, the 67th problem is descriptive “Of the properties of Æolipiles or bowels to blow the fire.” In the course of the article on this subject it is observed: “Vitruvius, in his first book of Architecture, cap. 8, approves from these engines, that winde is no other thing than a quantity of vapours and exhalations agitated with the aire by rarefaction and condensation;” a remark curious enough, if only for the last word “_condensation_.” The article concludes--“Now it is cunning and subtiltie to fill one of these Æolipiles with water at so little a hole, and therefore requires the knowledge of a philosopher to finde it out; and the way is thus:--Heat the Æolipiles being empty, and the aire which is within it will become extreamely rarefied; then being thus hot throw it into water, and the aire will begin to be condensed: by which meanes it will occupie lesse roome, therefore the water will immediately enter in at the hole to avoide vacuitie: thus you have some practicall speculation upon the Æolipile.” Here we have “condensation” a second time adverted to, while the whole experiment proves the folly of attributing to Savery a similar result as a novelty leading for the first time to a knowledge of the property of “condensation,” to the disparagement of the Marquis and his predecessors, assuming their total ignorance of what is here so clearly and graphically described.