Tracts: containing I. Suspicions about some hidden qualities of the air; with an appendix touching celestial magnets, and some other particulars. II. Animadversions upon Mr. Hobbes's Problemata de vacuo. III. A discourse of the cause of attraction by suction / [Robert Boyle].

Licence: Public Domain Mark

Credit: Tracts: containing I. Suspicions about some hidden qualities of the air; with an appendix touching celestial magnets, and some other particulars. II. Animadversions upon Mr. Hobbes's Problemata de vacuo. III. A discourse of the cause of attraction by suction / [Robert Boyle]. Source: Wellcome Collection.