Note k — BOOK I.

Among the Engines in which the Air is useful, Pumps may be accounted not contemptible ones, and divers other Hydraulical Engines, which need not to be particularly insisted on. In these the Water was imagined to rise by the power of Suction, to avoid a Vacuum, and such unintelligible Stuff; but the justly famous Mr. Boyl was the first that solved these Phænomena by the Weight of the Atmosphere. His ingenious and curious Observations and Experiments relating hereto, may be seen in his little Tract, Of the Cause of Attraction by Suction, and divers others of his Tracts.