The Exploded Bladder
Take a glass pipe open at both ends, to one of which tie fast a wet
bladder, and let it dry. Then place it on the plate of the pump. While
the air presses the bladder equally on both sides, it will lie even
and straight; but as soon as the air is exhausted, it will press
inwards, and be quite concave on the upper side. In proportion as the
air is exhausted, the bladder will become more stretched; it will soon
yield to the incumbent pressure, and burst with a loud explosion. To
make this experiment more easy, one part of the bladder should be
scraped with a knife, and some of its external fibres taken off.