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wherewith it self doth move; which we affirm absolutely to be
impossible to be done with any Machine imaginable.
But because
it may sometimes come to passe, that having but little Force, it is
required to move a great Weight all at once, without dividing it
in pieces, on this occasion it will be neceisary to have recourse to
the Machine, by means whereof the proposed Weight may be
transferred to the assigned Space by the Force given.
But yet
this doth not hinder, but that the same Force is to move, measuring
that same Space, or another equall to it, as many severall times as
it is exceeded by the said Weight.
So that in the end of the a
ction we shall sind that we have received from the Machine no
other benefit tnen only that of transporting the said Weight with
the given Force to the Term given, all at once.
Which Weight,
being divided into parts, would without any Machine have been
carried by the same Force, in the same Time, through the same
Intervall.
And this ought to passe for one of the benefits taken
from the Mechanicks: for indeed it frequently happens, that be
ing scanted in Force but not Time, we are put upon moving great
Weights unitedly or in grosse: but he that should hope, and at
tempt to do the same by the help of Machines without increase of
Tardity in the Moveable, would certainly be deceived, and would
declare his ignorance of the use of Mechanick Instruments, and
the reason of their effects.
Another benefit is drawn from the Instruments, which depend
eth on the place wherein the operation is to be made: for all In
struments cannot be made use of in all places with equall conve
nience.
And so we see (to explain our selves by an example) that
for drawing of Water out of a Well, we make use of onely a
Rope and a Bucket fitted to receive and hold Water, wherewith
we draw up a determinate quantity of Water, in a certain Time,
with our limited strength: and he that should think he could with
a Machine of whatsoever Force, with the same strength, and in
the same Time, take up a great quantity of Water, is in a grosse
Errour.
And he shall find himself so much the more deceived,
the more he shall vary and multiply his Inventions: Yet never
thelesse we see Water drawn up with other Engines, as with a Pump
that drinks up Water in the Hold of Ships; where you must note
that the Pump was not imployed in those Offices, for that it draws
up more Water in the same Time, and with the same strength
then that which a bare Bucket would do, but because in that place
the use of the Bucket or any such like Vessel could not effect what
is desired, namely to keep the Hold of the Ship quite dry from e
very little quantity of Water; which the Bucket cannot do, for
that it cannot dimerge and dive, where there is not a considerable
depth of Water.
And thus we see the Holds of Ships by the
