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 reducing Copper to a very combustible Substance: of heating the Air, by blowing it through a red-hot earthen Pipe, so as to burn Wood: of the Brightness of the Flame of Niter and Sulphur: of the burning and flaming of Tin Filings by the help of Niter: of kindling Bodies, in common rarified and condens'd Air, by the help of a Burning-glass: of the comparative Heat cast by a Burning-glass, in the Morning, and at Noon: of burning with a Lens made of Ice: of calcining Antimony in the Sun with Loss: to find whether Aurum Fulminans or Putris Fulminans do flame upon Explosion: of hatching Eggs with a Lamp Furnace.

Their second Sort of Experiments is of those that have been made in order to find out the Nature, Properties, and uses of Air. Such as these.

Experiments for determining the Height of the Atmosphere, for finding the Pressure of the Atmosphere: on the Tops of Mountains, on the surface of the Earth, and at the Bottoms of very deep Pits and Mines, by the Help of Quick-silver, and other Contrivances: for finding the Pressure of the Atmosphere, both in the same Place, and Places very far remov'd.

Experiments to determine the possible Bounds of Expansion and Condensation of the Air, by Heat and Cold, by exhausting and compressing: to determine the Strength of Air under the several Degrees of Rarefaction and Condensation: of the Force of condens'd Air in Wind-Guns, to state the comparative Gravity of the Air to other fluid and solid Bodies: to discover the refractive Power of the Air, under the several Degrees of Rarefaction and Condensation: to manifest the inflective Veins of the Air: to produce a Kind of Opacity of the Air: of the falling of Smoak in Rh