tion of a TugA Vuui\% tmreafonable 5 together with the afe that 
may be made of this Experiment in the eftimating the gravity 
of feveral Liquors, with fome tryals thereupon. 
13. About the Heights, to which Water and Mercury may be 
rais'd, pro port ionably to their fpecifick Gravities^ by the Spring 
of the Air. 
14. About the Heights anfwerable to their refpediive Gw 
<vfti'es 9 to which Mercury and Water mil fubfide, upon the with- 
drawing of the Spring of the Air. 
15. About the greateft height to which Water can be rais'd 
by Attradion: where the height of the Water is compar'd to 
that of the Qyickfilver at the fame time in a Barofcofe, and ex- 
amined according to the proportion of their fpecifick Gravities ; 
together with a reflexion on a miftake in the common Writers of 
Hydraulicks, having a conceit of carrying Water over never 
fo high Mountains. 
16. About the bending of a Springy Body in the exhaufted 
Receiver: no alteration of the Spring difcover'd. 
1 7 . About the making of Mercurial and other Gag ^where- 
by to efKmate how the Receiver is exhaufted : of which Gages 
one is preferr'd and defcribed. 
18. Concerning an ea fie way to make the Preflure of the 
Air fenfible to the Touch of thofe that doubt of it. 
19. About the Subfidence of Mercury in the Tube of the 
Torricell. Experiment to the Levell of the Stagnant Mercury; 
accompanied with fome confirmations of what had been faid in 
the firft Treatife ofthePhyfico-Mechanical Experiments. 
20. Shewing, that in Tubes open at both ends^ when no Ft$- 
ga Vacui can be pretended, the weight of water will raife Quick- 
filver no higher in (lender than in larger Pipes. 
21. Of the Heights, at which pure Mercury, and Mercury 
amalgam' d with Tinn, will ftand in Barometers % together with 
the ule that may be made of this experiment, to difcover how- 
much two mixt bodies penetrate one another ss alfo further to 
illuftrate 5 that the height of the Liquors in the Torricell. Expe- 
riment depends upon the ^quilibrmm with the outward Air, 
22. Propofeth a way of making Portable or Travailing Ba- 
rometers; with a particular defcription of the Figure, f uc h 
aBarometer is to be of, the way of filling it, putting it into a 
frame., and fecuring it from the harm, the Mercury it felf might 
