Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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1ſaid in another Paper (touching Co­
lours.) But the Inſtances that ſeem to
prove it are obvious: For Water or whites
of Eggs beaten to froth, do loſe their
tranſparency and appear white.
And ha­
ving out of one of our leſſer Receivers
carefully drawn out the Air, and ſo order'd
it, that the hole by which the Water was
to get in, was exceeding ſmall, that the
Liquor might be the more broken in its
paſſage thorow it, we obſerv'd with plea­
ſure, That, the Neck being held under
Water, and the little hole newly men­
tion'd being open'd, the Water that ruſh'd
in was ſo broken, and acquired ſuch a mul­
titude of new Surfaces, that the Receiver
ſeem'd to be full rather of Milk then Wa­
ter.
We have likewiſe found out, That
by heating a lump of Cryſtal to a certain
degree, and quenching it in fair Water, it
would be diſcontinu'd by ſuch a multi­
tude of Cracks, (which created new Sur­
faces within it) that though it would not
fall aſunder, but retain its former ſhape,
yet it would loſe its tranſparency, and ap­
pear white.
Upon theſe Conſiderations, My Lord,
and ſome others, it ſeem'd not abſur'd to
imagine, That upon the ruſhing of the Air

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