Boyle, Robert New experiments physico-mechanicall, touching the spring of the air and its effects 1660
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The 34th Experiment, containing several
attempts for the weighing of light Bodies in
the exhausted Receiver. 258 &c.

The 35th Experiment, touching the cause
of Filtration, and the rising of Water in
Siphons, 262 &c. A relation of a new
kinde of Siphon, of the Authors, upon
the occasion of trying the Experiment
lately observ'd by some French-men, and fur­
ther improv'd by himself; and some conje­
ctures touching the cause of the exhibited
Phænomena. 267 &c.

The 36th Experiment, touching the weigh­
ing of a parcel of Air in the exhausted Ves­
sel; and some other Observations for the ex­
plication thereof, 272 &c. An accidental
Experiment, tending to the further confir­
mation of the Authors Reflections upon the
first Experiment; with a digressive Obser­
vation, noting the subtil penetrancy of some
Spirits, to exceed by far that of the Air, 275
&c. And some other Experiments to shew the
difficulty of the ingress of the Air into the
pores or holes of some bodies into which Wa­
ter will readily insinuate it self, 279 &c. with
a conjecture at the cause thereof, 282. The
Author returns to the prosecution if the in­
quiry after the gravity of the Air: But first,
(upon the occasion of the tenacity of a thin