5[Figure 5]THe Proæmium, wherein is ſet down the
occaſion of this Diſcourſe, 1. The mo
tives that induc'd the Author thereunto, 2 &c.
The hints he received, 5. The things where
in this Engine excels any that have yet been
made uſe of, 6 &c. The deſcription of the
Engine and its parts, 8 &c. The way of pre
paring and uſing it, 15 &c. The diviſion of
the Experiments tryable thereby into two
ſorts, and the difficulty of excluding the
Air. 18 &c.
occaſion of this Diſcourſe, 1. The mo
tives that induc'd the Author thereunto, 2 &c.
The hints he received, 5. The things where
in this Engine excels any that have yet been
made uſe of, 6 &c. The deſcription of the
Engine and its parts, 8 &c. The way of pre
paring and uſing it, 15 &c. The diviſion of
the Experiments tryable thereby into two
ſorts, and the difficulty of excluding the
Air. 18 &c.
The firſt Experiment, touching the man
ner of pumping out the Air, and by what de
grees the Receiver is emptyed, 20, &c. A di
greſsion touching the Spring or Elaſtical
power of the Air, with an attempt for a Me
chanical Explication thereof, neceſſary to be
premiſ'd for the explanation of the Phæno
mena, exhibited in this and the ſubſequent
Experiments. 22 &c.
ner of pumping out the Air, and by what de
grees the Receiver is emptyed, 20, &c. A di
greſsion touching the Spring or Elaſtical
power of the Air, with an attempt for a Me
chanical Explication thereof, neceſſary to be
premiſ'd for the explanation of the Phæno
mena, exhibited in this and the ſubſequent
Experiments. 22 &c.