Page:Philosophical Transactions - Volume 003.djvu/229

 34. Shews, that the Cause of the Ascension of Liquors in Syringes is to be deriv'd from the Pressure of the Air.

35. Shews, that upon the Pressure of the Air depends the sticking of Cupping-Glasses to the fleshy parts they are apply'd to.

36. About the making, without heat, a Cupping-Glass to lift up a great weight.

37. Shews, that Bellows, whose Nose is very well stopt, will open of themselves, when the Pressure of the External Air is taken off.

38. About an attempt to examine the Motions and Sensibility of the Cartesian Materia Subtilis, with a Pair of Bellows (made of a Bladder) in the exhausted Receiver.

39. Contains a further attempt to prosecute the Inquiry propos'd in the fore-going Experiment: First with a Syringe and a Feather; then with a Syringe in Water; where 'tis examin'd, if there be an Æther or Materia Subtilis, what kind of body it must be: with a Confirmation of the 34th Experiment.

40. About the falling, in the exhausted Receiver, of a light Body, fitted to have its motion visibly varied by a small resistance of the Air: where is mention'd a Design to try this way, what the degrees of Celerity would be of descending Bodies in an exhausted Receiver. Directions given, which way to lengthen Receivers for the Trial of this and other Experiments.

41. About the propagation of Sounds in the exhausted Receiver: Two Trials perform'd by the contrivance described as necessary for this and divers other Experiments: Where also is examin'd an assertion of Mersennus, and a Proposal of his shewn to be unpracticable, &c.

42. About the breaking of a Glass-drop in an exhausted Receiver, wherein an Hypothesis, ascribing the Cause of the breaking of them to the force of the External Air, is examin'd.

43. Concerning the Production of Light in the exhausted Receiver.

44. Touching the Production of a kind of Halo and Colours in such a Receiver: The reason of it propos'd, with a suggestion, that the same cause might have been of that Apparition of Light mention'd in the formerly publisht Experiments.

45. About the Production of Heat by Attrition in the exhausted Receiver.

46. About the slaking of Quick-Lime in it. Rh