Page:History of the Royal Society.djvu/242

 Air: to make Glass-bubbles swim in Air very much condens'd: of Glass-balls rising in a heavy, or condens'd Air, and falling in a lighter and more rarified.

Experiments of the Propagation of Sounds through common rarified and condens'd Air: of the Congruity or Incongruity of Air, and its Capacity to penetrate some Bodies, and not others: of generating Air by corrosive Menstruums out of fermenting Liquors, out of Water, and other Liquors, by heat, and by exhaustion: of the returning of such Air into the Water again: of the vanishing of Air into Water exhausted of Air: of the maintaining, and increasing a Fire by such Airs: of the Fitness and Unfitness of such Air for Respiration: of the use of Air in breathing.

Experiments of keeping Creatures many hours alive, by blowing into the Lungs with Bellows, after that all the Thorax, and Abdomen were open'd and cut away, and all the Entrails save the Heart, and Lungs remov'd: of reviving Chickens, after they have been strangled, by blowing into their Lungs: to try how long a Man can live, by expiring and inspiring again the same Air: to try whether the Air so respired, might not by several Means be purified, or renew'd: to prove that it is not the Heat nor the Cold of this respired Air, that choaks.

Experiments of the respiring of Animals, in Air much rarified, and the fatal Effects: of the long Continuance of several Animals very well in Air as much condens'd, as it will be under Water, at two hundred Fathoms deep, that is about eight times: of the Quantity of fresh Air requisite for the Life of a respiring Animal, for a certain : of making Air unfit for Respiration, by satiating it, by suffering Rh