<p type="main"> <s><emph type="italics"/>The &longs;eventeenth Experiment, touching the <lb/>
gradual de&longs;cent of the Quick-&longs;ilver in the <lb/>
Torricellian Experiment,<emph.end type="italics"/> 106 &c. <emph type="italics"/>Some <lb/>
ob&longs;ervable Circum&longs;tances concerning it,<emph.end type="italics"/><lb/>
112 &c. <emph type="italics"/>The &longs;ame Experiment try'd in <lb/>
one of the &longs;mall Receivers,<emph.end type="italics"/> 115. <emph type="italics"/>How <lb/>
this Experiment may be made u&longs;e of to know <lb/>
the &longs;trength of the pre&longs;&longs;ure of the Air for <lb/>
every degree of Rarefaction,<emph.end type="italics"/> 116 &c. <emph type="italics"/>The <lb/>
tryal of the &longs;ame Experiment in a Tube not <lb/>
two foot long,<emph.end type="italics"/> 118. <emph type="italics"/>The rai&longs;ing of the Mer<lb/>
curial Cylinder, by the forcing of more Air <lb/>
into the Receiver,<emph.end type="italics"/> 119. <emph type="italics"/>Some Allegations <lb/>
for and again&longs;t a<emph.end type="italics"/> Vacuum <emph type="italics"/>con&longs;ider'd,<emph.end type="italics"/> 120 <lb/>
&c. <emph type="italics"/>Some Adverti&longs;ements concerning the <lb/>
inconveniencies that may ari&longs;e from the di<lb/>
ver&longs;ity of mea&longs;ures made u&longs;e of for the defi<lb/>
ning the Altitute of the Mercurial Cylinder; <lb/>
and from the neglect of little parcels of Air <lb/>
apt to remain between the Mercury and the <lb/>
concave &longs;urface of the Tube,<emph.end type="italics"/> 123 &c. <emph type="italics"/>Some <lb/>
Expedients for the more exact filling the <lb/>
Tube,<emph.end type="italics"/> 127. <emph type="italics"/>The height the Author once found <lb/>
of the Mercurial Cylinder, according to En<lb/>
gli&longs;h mea&longs;ure.<emph.end type="italics"/> 128. </s></p>

<p type="main"> <s><emph type="italics"/>The eighteenth Experiment, containing <lb/>
a new Ob&longs;ervation touching the variation <lb/>
of the height of the Mercurial Cylinder in <lb/>
the &longs;ame Tube, with an o&longs;&longs;er at the rea&longs;on<emph.end type="italics"/>