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

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1alter the diſpoſition of their inſenſible
parts, as to become a white and conſiſtent
Body.
And this happens not as in the
precipitation of Benjamin, and ſome o­
ther Reſinous Bodies, which being diſ­
ſolv'd in Spirit of Wine, may, by the effu­
ſion of fair Water, be turn'd into a ſeem­
ingly Milky ſubſtance.
For this white­
neſs belongs not to the whole Liquor, but
to the Corpuſcles of the diſſolv'd Gum,
which after a while ſubſiding leave the Li­
quor tranſparent, themſelves onely re­
maining white: Whereas in our caſe, 'tis
from the vary'd texture of the whole for­
merly tranſparent fluid Body, and not
from this or that part that this whiteneſſe
reſults: For the Body is white thorowout,
and will long continue ſo; and yet may,
in proceſs of time, without any addition,
be totally reduc'd into a tranſparent Bo­
dy as before.
But beſides the Conjecture inſiſted on
all this while, we grounded another upon
the following Obſervation, which was,
That having convey'd ſome ſmoke into
our Receiver plac'd againſt a Window, we
obſerv'd, that upon the exſuction of the
Air, the Corpuſcles that were ſwimming
in it, did manifeſtly enough make the Re-

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