as is u&longs;ual, &longs;ome little Particles of Air in <lb/> the &longs;pace it de&longs;erted, as we ghe&longs;t by ob­<lb/> &longs;erving, that upon the Application of hot <lb/> Bodies to the upper part of the Tube, the <lb/> Quick-&longs;ilver would be a little depre&longs;&longs;'d. <lb/> </s>
<s>La&longs;tly, having put both the Tube and the <lb/> Ve&longs;&longs;el it lean'd on into a convenient <lb/> Wooden Frame, to keep them from mi&longs;­<lb/> chances: we plac'd that Frame in a Win­<lb/> dow within my Bed-chamber, that I might <lb/> both keep the Mercury from being &longs;tirr'd, <lb/> and have opportunity to watch from time <lb/> to time the <emph type="italics"/>Phænomena<emph.end type="italics"/> it was to exhibit. <lb/> </s>
<s>For the better di&longs;covery of which, when <lb/> the Quick-&longs;ilver both in the Tube and <lb/> &longs;ubjacent Ve&longs;&longs;el was perfectly at re&longs;t, we <lb/> took notice, by a mark made on the out­<lb/> &longs;ide of the Gla&longs;s, how high the included <lb/> Liquor then reach'd. </s></p>
<p type="main">
<s>During &longs;everal Weeks that the Tube <lb/> was kept in that Window (which was very <lb/> rarely open'd) I had the opportunity to <lb/> ob&longs;erve, that the Quick-&longs;ilver did &longs;ome­<lb/> times faintly imitate the Liquor of a <lb/> Weather-gla&longs;s, &longs;ub&longs;iding a little in warm, <lb/> and ri&longs;ing a little in cold Weather, which <lb/> we a&longs;cribed to the greater or le&longs;&longs;er pre&longs;&longs;ure <lb/> of that little Air that remain'd at the top <lb/> of the Tube, expanded or conden&longs;'d by
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