nd if it extinguished it, they took it for an Infallible
sign that the Water was bad.

The _Cisterns_ were made to receive Rain Water in great Conservatories
under Ground, whose Walls on all Sides, and at the bottom were built
with Mortar of strong Lime, and Sand, and Pebbles, all well beaten
together. They made several Conservatories, and the Water passed from
one to another, to the end it might leave all the Dirt in the first and
second; They likewise put Salt in their _Cistern-Water_ to make it more
subtile.

ART. III.

_Of_ Machines _for carrying and lifting
up great Stones and Burthens._

[Sidenote: _Lib. 10. Chap. 6._]

_Ctesiphon_ and his Son _Metagenes_, Architects of the Temple of
_Ephesus_, invented _Machines_ to carry _great Stones_, out of which
_Pillars_ and _Architraves_ were to be made. That which was made to draw
the _Pillars_, was but a sort of a Frame as long as the _Pillars_, in
the end of which were fastned Pins of Iron, which entred into the ends
of the Frame, and served instead of an Axle-tree, the _Pillar_ it self
serving for a Wheel: And this had the desired Effect, because of the
disposition of the place through which these _Stones_ were to be drawn,
which was a flat and level Country.

The other _Machine_ for drawing of _Architraves_, was the same Frame
which had two Wheels at each end, which supported the _Architrave_;
which served instead of an Axle-tree.

[Sidenote: _Lib. 10. Chap. 2._]

For the raising of great Weights, they had three sorts of _Machines_.
The first was composed of three pieces of Wood, which were joyned
together at top by a Pin which went through them all; so that there were
two of these pieces which were on one side, a little distance one from
the other, and the third was opposite to them; The two which were
together on the one side, had a Hand-Mill which drew a Rope, which
passed within a Truckle with three Pullies, of which that part which had
the two Pullies was fastned to the top of the _Machine_, and that which
had but one, was fastned to the Weight to be drawn up.

[Sidenote: _Lib. 10. Chap. 2._]

The second _Machine_ was stronger than the first, because the _Moulin_
had more Pullies, and instead of a _Moulin_ or Hand-Mill, it had a great
Wheel, whose Axle-tree drew a Rope which passed through these Pullies,
and upon the Wheel there was another Rope twisted, which was drawn by a
Wind-glass; sometimes the great Wheel was hollow, so that Men could walk