| Boyle, Robert New experiments physico-mechanicall, touching the spring of the air and its effects 1660 |
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time then another, we are not yet pro
vided of any better Answer, then this
general one, That the Air about us,
and much more that within the Receiver,
may be much alter'd by such causes as few
are aware of: For, not to repeat those
probable Arguments of this Assertion
which we have occasionally mention'd
here and there in the former part of this
Epistle, we will here set down two or
three Instances to verifie the same Propo
sition.
First, I finde that the Learned
Fosephus Acosta, among other Judicious
Observations he made in America, hath
this concerning the Effects of some
Winds; There are (says he) Winds which
naturally trouble the Water of the Sea, and
make it green, and black; others, clear as
Crystal. Next, we have observ'd, That
though we conveyd into the Receiver our
Scales, and the Pendula formerly men
tion'd, clean and bright; yet after the Re
ceiver had been empty'd, and the Air let in
again, the gloss or lustre both of the one,
and of the other, appear'd tarnish'd by a
beginning rust.
And in the last place, we
will subjoyn an Observation we made
some Years ago, which hath been heard
of by divers Ingenious Men, and seen
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