1true Experiments may, by reaſon of
the eaſie miſtake of ſome unheeded
Circumſtance, be unſucceſsfully try'd;
we will Advertiſe, on this occaſion,
that we did oftentimes in vain try the
breaking of Bladders, after the manner
above-mention'd: Of which the cauſe
appear'd to be this, That the Bladders we
could not break, having been brought us
ready blown from thoſe that ſold them,
were grown dry before they came to our
hands: whence it came to paſs, that, if
we afterwards ty'd them very hard, they
were apt to fret and ſo become unſervice
able; and if we ty'd them but moderate
ly hard, their ſtiffneſs kept them from be
ing cloſ'd ſo exactly, but that when the
included Air had in the exhauſted Recei
ver diſtended them as much as eaſily it
could, it would in part get out between
the little wrinkles of the Sphincter of the
Neck: Whence alſo it uſually happen'd,
that, upon the letting in the Air from
without, the Bladders appear'd more flac
cid and empty then before they were put
in; whereas when the Bladders were
brought us moiſt from the Butchers, we
could, without injuring them, tye their
necks ſo cloſe, that none of the Air once
the eaſie miſtake of ſome unheeded
Circumſtance, be unſucceſsfully try'd;
we will Advertiſe, on this occaſion,
that we did oftentimes in vain try the
breaking of Bladders, after the manner
above-mention'd: Of which the cauſe
appear'd to be this, That the Bladders we
could not break, having been brought us
ready blown from thoſe that ſold them,
were grown dry before they came to our
hands: whence it came to paſs, that, if
we afterwards ty'd them very hard, they
were apt to fret and ſo become unſervice
able; and if we ty'd them but moderate
ly hard, their ſtiffneſs kept them from be
ing cloſ'd ſo exactly, but that when the
included Air had in the exhauſted Recei
ver diſtended them as much as eaſily it
could, it would in part get out between
the little wrinkles of the Sphincter of the
Neck: Whence alſo it uſually happen'd,
that, upon the letting in the Air from
without, the Bladders appear'd more flac
cid and empty then before they were put
in; whereas when the Bladders were
brought us moiſt from the Butchers, we
could, without injuring them, tye their
necks ſo cloſe, that none of the Air once
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