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

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              ſervable, that after the two or three firſt
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              exſuctions of the Air, the Flame (except
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              at the very top) appear'd exceeding blew,
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              and that the Flame ſtill receded more and
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              more from the Tallow, till at length it
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              appear'd to poſſeſs onely the very top of
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              the Week, and there it went out. </s>
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              <s>The ſame Candle being lighted again
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              was ſhut into the Receiver, to try how it
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              would laſt there without drawing forth
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              the Air, and we found that it laſted much
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              longer then formerly; and before it went
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              out receded from the Tallow towards the
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              the top of the Week, but not near ſo
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              much as in the former Experiment. </s>
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              <s>And having an intention to obſerve par­
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              ticularly what the motion of the ſmoak
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              would be in theſe Experiments: We
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              took notice that when the Air was not
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              drawn out, there did upon the extinction
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              of the Flame a conſiderable part of the
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              Week remain kindled, which (probably
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              by reaſon of the Circulation of the Air
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              in the Veſſel, occaſion'd by the heat) e­
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              mitted a Steam, which aſcended ſwiftly
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              and directly upwards in a ſlender and unin­
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              terrupted Cylinder of ſmoke, till it came
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              to the top, whence it manifeſtly recoyl'd
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              by the ſides to the lower part of the Veſ-</s>
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