EXPERIMENT V. Concerning a Bladder which burst in the Re∣ceiver, and another by Heat.
* 1.1HAving put a Bladder moderately Blown into the Receiver, before the whole Air was drawn out, the Air presently expanded and broke the Bladder with a considerable Crack; and tho this Experiment frequently succeeds, yet if the Bladder be one that is too dry, it is hard to tie it so fast, but that some of the included Air will get out, and so frustrate the Tryal. But to be fully inform'd whether the Air is out or not, we may be satisfi'd, by admitting Air afresh into the Receiver, which will, if the mention'd Acci∣dent happens, compress the Bladder more than when it was first put in. But it is not only possible, that the Air should expand it self so powerfully in an exhausted Receiver; but if a Bladder well blown, be brought near a good sire, the included Air will burst the Bladder with a considerable Noise.