explication of filtration, and several
29other Phænomena; such as the motion
of Bodies on the surface of Liquors;
30several Experiments mention'd to this
purpose. Of the height to which the
water may rise in these Pipes; and a
31conjecture about the juices of Vegetables, &
the use of their pores. A further explication of Congruity:
And an attempt of solving the Phænomena of the strange
Experiment of the suspension of the
32Mercury at a much greater height
then thirty inches. The efficacy of
immediate contact, and the reason of it.
33Observ. 7.Of Glass drops.
Several Experiments made with
34these small Bodies. The manner of the
breaking and flawing of them, explicated
35by Figures. What other bodies
will be flawed much in the same manner:
so other tryals, and a description
of the Drops themselves: some
conjectures at the cause of the Phænomena,
indeavoured to be made probable
36by several Arguments and Experiments.
An Experiment of the expansion
of Water by heat, and shrinking by
cold: the like Proprieties suppos'd in
37Glass drops, and what effects proceed
from them: the seven Propositions on
which the conjectures are grounded.
Experiments to shew, that bodies expand
38by heat. The manner of making
Thermometers, and the Instrument
39for graduating them. The manner of
graduating them, and their use: Other
Experiments to prove the expansion
40of bodies by heat. Four experimental
Arguments to prove the expansion
41of Glass by heat: further prov'd by the
Experiment of boyling Alabaster;
which is explicated. An explication
of the contracting of heated Glass upon
42cooling. An explication how the
parts of the Glass become bent by sudden
cold, and how kept from extricating
themselves by the contignation of
the Glass drop; which is further explicated
by another Experiment made
43with a hollow Glass ball: the reason of
the flying asunder of the parts further
explicated: that 'tis probable these bodies
may have many flaws, though not
visible, and why: how a gradual heating
44and cooling does put the parts of
Glass, and other hardned bodies,
into a looser texture.
Observ. 8.Of Fiery Sparks.
The occasion and manner of making
this Experiment: divers Observations
45set down in order to the finding
out the reasons: some conjectures
concerning it, which are endeavoured
to be explicated and confirm'd by several
Experiments and Reasons: the
46Hypothesis a little further explicated.
Some Observations about the
47Globular Figure: and an Experiment
of reducing the filings of Tin or Lead
to exactly round Globules.
Observ. 9.Of Fantastical Colours.
The texture of Muscovy Glass; its
Figures: what other Bodies are like it:
48that it exhibits several colours, and
how: several Observations and Experiments
about those colours: the reason
49why on this occasion the nature of colours
is inquir'd into. A conjecture at
50the reason of these colours explicated
by several Experiments and Reasons:
First, by continual cleaving the Body
till it become colour'd. Secondly, by
producing all kinds of colours with
two flat Plates of Glass. Thirdly, by
blowing Glass so thin in the Lamp, till
51it produce the same effect. Fourthly, by
doing the same with Bubbles of divers
other transparent Bodies: the
reasons of the colours on nealed Steel,
52where by the way the causes of the
