23d—A Parcel of Air weighed in the Balance; its Specifick Gravity to that of Water determined thereby; an artificial Storm, shewing that high Winds may make the Barometer sink much and suddenly.
24th—The Weight, Pressure, and Spring of the Air prov'd several ways; by the Sense of Feeling; by breaking Glass Vials; the Phænomena of Bladders, Glass-bubbles, Fountains; the Gardiner's Watering-Pot; the Diving-Bell, &c.
25th—The Torricellian Tube in Vacuo; Quicksilver raised to the usual Height of the Weather-Glass, by the bare Spring of a little included Air; Otto Gerick's Hemispheres; and that dense Air has the same Advantage over common Air, as that has over a Vacuum.
The Ebullition of Liquors in Vacuo; the Quantity of Air contain'd in them; the Sustentation of Fumes and Vapours; the Descent of Bodies in Vacuo.
The more hidden Properties of the Air consider'd by the help of the like Engines.
26th Day. The Influence of the Air examin'd as to the Causes of Magnetism; the Elasticity of Springs; the Cohæsion of the Parts of Matter; the Sphericity of the Drops of Fluids; the Ascent of Liquors in capillary Tubes, and between Glass-Planes in the Curve of the Hyperbola, both by the Attractive and Repulsive Power of the Glass.
27th—The Influence of the Air, as to Sounds, Fire, and Flame; the Consumption of Fuel; the firing of Gunpowder; the Effects of rarified, condensed, and burnt Air upon the Life of Animals.
28th—A Piece of Phosphorus in Vacuo; new Experiments concerning the Mercurial Phosphori; Experiments concerning the Electricity of Bodies.
Every SUBSCRIBER is to pay Three Guineas; One Guinea at the Time of Subscription, and the Remainder, the First Day of the Course.