Page:Philosophical Transactions - Volume 003.djvu/227

 of a Fuga Vacui is unreasonabie; together with the use that may be made of this Experiment in the estimating the gravity of several Liquors, with some tryals thereupon.

13. About the Heights, to which Water and Mercury may be rais'd, proportionably to their specific Gravities, by the Spring of the Air,

14. About the Heights answerable to their respective Gravities, to which Mercury and Water will subside, upon the withdrawing of the Spring of the Air.

15. About the greatest height to which Water can be rais'd by Attraction: where the height of the Water is compar'd to that of the Quicksilver at the same time in a Baroscope, and examined according to the proportion of their specific Gravities; together with a reflexion on a mistake in the common Writers of Hydraulicks, having a conceit of carrying Water over never so high Mountains.

16. About the bending of a Springy Body in the exhausted Receiver: no alteration the Spring discover'd.

17. About the making of Mercurial and other Gages, whereby to estimate how the Receiver is exhausted: of which Gages one is preferr'd and described.

18. Concerning an easie way to make the Pressure of the Air sensible to the Touch of those that doubt of it.

19. About the Subsidence of Mercury in the Tube of the Torricell. Experiment to the Levell of the Stagnant Mercury; accompanied with some confirmations of what had been said in the first Treatise of the Physico-Mechanical Experiments.

20. Shewing, that in Tubes open at both ends, when no Fuga Vacui can be pretended, the weight of water will raise Quicksilver no higher in slender than in larger Pipes.

21. Of the Heights, at which pure Mercury, and Mercury amalgam'd with Tinn, will stand in Barometers; together with the use that may be made of this experiment, to discover how much two mixt bodies penetrate one another; as also further to illustrate, that the height of the Liquors in the Torricell. Experiment depends upon the Æquilibrium with the outward Air.

22. Proposeth a way of making Portable or Travailing Barometers; with a particular description of the Figure, such a Barometer is to be of, the way of filling it, putting it into a Frame, and securing it from the harm, the Mercury it self might Rh