Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660
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              ing (probably by reaſon of the numerous
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              bubbles wont to be obſervable in Ice) the
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              outward parts of the Egge, that it uſually
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              crack'd the ſhell, though the inner Mem­
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              brane that involv'd the ſeveral Liquors
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              of the Egge, becauſe it would ſtretch
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              and yield, remain d unbroken, And here­
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              upon we imagin'd that in our Engine it
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              might appear whether or no there were
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              any conſiderable Spring, either in any of
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              the Liquors, or in any other more ſpiri­
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              tuous ſubſtance included in the Egge. </s>
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              <s>We took alſo ſome Spirit of Urine,
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              careleſly enough deflegmed, and put it in­
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              to the ſame Glaſs (firſt carefully ſcowr'd
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              and cleanſ'd) wherein we had put the Oyl­
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              olive above mention'd: We took alſo an­
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              other Glaſs, differing from a Glaſs Egge,
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              onely in that its bottom was ſlat, and fill'd
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              it up to about 2/3 of the Neck (which was
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              wider then that of the Egge) with rectifi­
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              ed Spirit of Wine. </s>
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              <s>We took alſo another Glaſs Egge, and
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              having fill'd it with common Water till it
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              reach'd to the middle of the Neck, we
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              pour'd to it of the ſame Spirit of Wine,
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              till it reach'd about an Inch higher. </s>
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              <s>Theſe three Glaſſes having marks ſet
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              on them, over againſt the edges of the </s>
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