(846)
2. Sheweth, that much included Air rais'd Mercury in an open Tube no higher, than the weight of the Atmosphere may in a Baroscope: where notice is taken of the great force of the Spring of the Air then when it could not raise the Mercury any higher.
3. Sheweth, that ye Spring of the included Air will raise Mercury to almost equal heights in very unequal Tubes; where the reason is added, why this and the former Experiment were not tried in Water; as also an Account of an adventitious Spring, that was super-added to the Air by Heat.
4. About a New Hydraulo-pneumatical Fountain, made by the Spring of un-compressed Air; together with the uses to be made of it, as in Hydraulo-pneumaticks, or to shew, by what degrees the Air restores its self to its Spring; or especially to find, what kind of Line the Salient water describes in rarify'd Air.
5. About a way of speedily breaking flat Glasses by the weight of the Atmosphere.
6. Sheweth, that the breaking of Glass-plates in the foregoing experiment need not to be imputed to the Fuga Vacui.
7. About a convenient way of breaking blown Bladders by the Spring of the Air included in them: and of the usefulness of this Experiment in other tryals.
8. About the lifting up a considerable weight by the bare Spring of a little Air included in a Bladder. Which as 'tis a surprising experiment, so it seems not unserviceable for the explaining of the motion of the Muscles.
9. About the breaking of Hermetically seal'd Bubbles of Glass by the bare Spring of their own Air; with an observation, that they broke not presently, and what the reason might be of the slowness of that effect.
10. Contains two or three trials of the force in the Spring of our Air uncompress'd, upon stable and even solid Bodies, whereto 'tis external.
11. Shews, that Mercury will in Tubes be rais'd by Suction no higher than the weight of the Atmosphere is able to impell it up: where the Principle of a Fuga Vacui, and that of a Funiculus are shewn to be insufficient.
12. About the different heights, whereto Liquors will be rais'd by Suction, according to their several specifick Gravities: accompanied with a remark, that the proportion of the weight of Mercury to Water is not quite as 14 to 1.; as also, that the no-
