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

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