SAGR. You Divine Simplicius, I was thinking if a Million of
Gold per annum, coming from Spaine, not being ſufficient to pay
the Army, whether it was neceſſary to make any other proviſion
than of Money to pay the Souldiers. But proceed, Salviatus, and
ſuppoſing that I admit of your Conſequence, ſhew us how to ſe
parate the opperation of Vacuity from the other, that meaſuring
it we may ſee how it's inſufficient for the Effect of which we ſpeak.
Gold per annum, coming from Spaine, not being ſufficient to pay
the Army, whether it was neceſſary to make any other proviſion
than of Money to pay the Souldiers. But proceed, Salviatus, and
ſuppoſing that I admit of your Conſequence, ſhew us how to ſe
parate the opperation of Vacuity from the other, that meaſuring
it we may ſee how it's inſufficient for the Effect of which we ſpeak.
SALV. Your Genius hath prompted you. Well, I will tell you
the way to part the Virtue of Vacuity from the reſt, and then how
to meaſure it. And to ſever it, we will take a continuate matter,
whoſe parts are deſtitute of all other Reſiſtance to Separation, ſave
only that of Vacuity, ſuch as Water at large hath been demon
ſtrated to be in a certain Tractate of our Accademick. So that
when ever a Cylinder of Water is ſo diſpoſed, that being drawn
we find a Reſiſtance againſt the ſeparation of its parts, this muſt
be acknowledged to proceed from no other cauſe, but from re
pugnance to Vacuity. But to make ſuch an experiment, I have
imagined a device, which with the help of a ſmall Diagram, may
be better expreſt than by my bare words. Let this Figure C A B D
be the Profile of a Cylinder of Metal, or of Glaſs, which muſt
be made hollow within, but turned exactly round; into whoſe
Concave muſt enter a Cylinder of Wood, exquiſitely fitted to
touch every where, whoſe Profile is noted by
E G H F, which Cylinder may be thruſt up
55[Figure 55]
wards, and downwards: and this I would
have bored in the middle, ſo that there may
a rod of Iron paſs thorow, hooked in the end
K, and the other end I, ſhall grow thicker in
faſhion of a Cone, or Top; and let the
hole made for the ſame thorow the Cylinder
of Wood be alſo cut hollow in the upper
part, like a Conical Superficies, and exactly
fitted to receive the Conick end I, of the
Iron I K, as oft as it is drawn down by the
part K. Then I put the Cylinder of Wood
E H into the Concave Cylinder A D, and
would not have it come to touch the upper
moſt Superficies of the ſaid hollow Cylinder,
but that it ſtay two or three fingers breadth
from it: and I would have that ſpace filled with Water; which
ſhould be put therein, holding the Veſſel with the mouth C D up
wards; and thereupon preſs down the Stopper E H, holding the
Conical part I ſomewhat diſtant from the hollow that was made
the way to part the Virtue of Vacuity from the reſt, and then how
to meaſure it. And to ſever it, we will take a continuate matter,
whoſe parts are deſtitute of all other Reſiſtance to Separation, ſave
only that of Vacuity, ſuch as Water at large hath been demon
ſtrated to be in a certain Tractate of our Accademick. So that
when ever a Cylinder of Water is ſo diſpoſed, that being drawn
we find a Reſiſtance againſt the ſeparation of its parts, this muſt
be acknowledged to proceed from no other cauſe, but from re
pugnance to Vacuity. But to make ſuch an experiment, I have
imagined a device, which with the help of a ſmall Diagram, may
be better expreſt than by my bare words. Let this Figure C A B D
be the Profile of a Cylinder of Metal, or of Glaſs, which muſt
be made hollow within, but turned exactly round; into whoſe
Concave muſt enter a Cylinder of Wood, exquiſitely fitted to
touch every where, whoſe Profile is noted by
E G H F, which Cylinder may be thruſt up
55[Figure 55]wards, and downwards: and this I would
have bored in the middle, ſo that there may
a rod of Iron paſs thorow, hooked in the end
K, and the other end I, ſhall grow thicker in
faſhion of a Cone, or Top; and let the
hole made for the ſame thorow the Cylinder
of Wood be alſo cut hollow in the upper
part, like a Conical Superficies, and exactly
fitted to receive the Conick end I, of the
Iron I K, as oft as it is drawn down by the
part K. Then I put the Cylinder of Wood
E H into the Concave Cylinder A D, and
would not have it come to touch the upper
moſt Superficies of the ſaid hollow Cylinder,
but that it ſtay two or three fingers breadth
from it: and I would have that ſpace filled with Water; which
ſhould be put therein, holding the Veſſel with the mouth C D up
wards; and thereupon preſs down the Stopper E H, holding the
Conical part I ſomewhat diſtant from the hollow that was made