057 )

6y. Dimostratione Fisico-Matemat : ca Delle fette Propositioni, ehe promesse- n. 65. p, toij.Donato Rofetti. sn Firenx.e 1668. in 4 0 .

70. Observarions touching the TorriceUian Experiment, and the Various So- n. io+.p. 78.lutions of the sime, especially touching the fVeigbt and Elaßicitj of the Air,

Lcnd. 1674 ' n 8°.

71. Tracts wvittenby the Hon. Rob. Boyle, of a Discovery of the admira- »- 67, p. rosrble Rarefallion of the Air. (even without Fleat) New Obsirvations about theDuration of the Spring of the Air ; New Experiments touching the Condensa -

tion of the Air by meer Cohi ; and its Comprejßon without Mecbantcal EnginetlAnd the admirably Differing Extevßon of the fime Quantity of Air Rarifiedand Compreßed. L and. i 6 jo. in 4 0 . ,

yx. Tracts, written by the Hon. Rob Boyle , containing new Experiments n. 19 p. p97.touching the Relation betwixt Flame and Air, and about Explsioni: An Hy-drostatical Disioursi, occasion’d by some Objections of Dp dien. Moore , &c.

To which is annext an Hydroßatical Letter, about a way of bVeigbing Waterin Water : New Experiments of the Rofitive or Relative Levity of Bodiesunder Water ; of the Air*s Spring on Bodies under Water ; and about the dif-fering Preß'ure of Heavy Soltds and Fluidi • Lond. 16yx. in 8°.

73 Tracts, consisting of Oblervations about the Saltnefs of the Seal An n.9;. p .Account of a Statical Hygrofcope and its Usis; together with an Appendix a-bout the Force of the Air s Moißure-, And a Fragment about the Natural andTreternatural State of Bodies by the Hon.FoL Boyle. To ali which is premisid.aSceptical Dialogue about the Poßtive or Privative Nature of Cqld: By a Mem*ber of the R. Society. Lond. 1673. in 8°.

74. Tracts, containing. 1. Sufpicions about some Midden Quali ties of the n. 110. p. ti$.Air, with an Appendix touching Celeßial Magnets , and some other Particulare

x. Animadversions upon Mr. HobV 1 Problemata de Vacuo. 3. A Discourle ofthe Lausi of Attrattion by SuBion : By the Hon. Rob. Boyle. hlqr. Lond. 1674.in 8°.

75. A Disiourse concerning the Origin and Properties of Wind, &c. by R. n.9*. p. p 4 ;.’

Bobun.Oxon. 1671. in 8°. ■

76. Aero-Chaiinos, a Regißer for the Air, Ac. by Natb. Henßiaw. M. p. n. ijj. p. 8 j 4 .Lcnd. 1677. in ix°.

C H A P. II.

Hydrology.

I- " I A KE a Globe of Firr or Maple, or other light Wood, as A. let it be r« Stund theA well sicured by Varnilh, Pitch, or otherwife, from Imbibing Water ; DeptbtftheSe»then take a piece of Lead, or Stone, D, considerably Heavier than will Sinkthe Globe: Let there be a long Wire Staple B, in the Ball A, and a Spring- n. 9 - p. 147.ing Wire C, with a bended end F, and into the siid Staple, preß in with your n ' 14p ‘ 43s ‘Fingere the Springing Wire on the bended end : And on it hang the Wcight D,

Vol II. L 1 by