E. Burgess' translation, New Haven, 1860.

[Illustration: Figure 9.--ANTIKYTHERA MACHINE, PARTIAL RECONSTRUCTION
BY THEOPHANIDIS (see footnote 16).]

A self-revolving instrument [or swayanvaha yantra]: Make a
wheel of light wood and in its circumference put hollow
spokes all having bores of the same diameter, and let them
be placed at equal distances from each other; and let
them also be placed at an angle verging somewhat from the
perpendicular: then half fill these hollow spokes with
mercury; the wheel thus filled will, when placed on an
axis supported by two posts, revolve of itself.

Or scoop out a canal in the tire of the wheel and then
plastering leaves of the T[.a]la tree over this canal with
wax, fill one half of this canal with water and the other
half with mercury, till the water begins to come out, and
then cork up the orifice left open for filling the wheel.
The wheel will then revolve of itself, drawn around by the
water.

Description of a syphon: Make up a tube of copper or other
metal, and bend it in the form of an Ankus'a or elephant
hook, fill it with water and stop up both ends. And then
putting one end into a reservoir of water let the other
end remain suspended outside. Now uncork both ends. The
water of the reservoir will be wholly sucked up and fall
outside.

Now attach to the rim of the before described
self-revolving wheel a number of water-pots, and place the
wheel and these pots like the water wheel so that the
water from the lower end of the tube flowing into them on
one side shall set the wheel in motion, impelled by the
additional weight of the pots thus filled. The water
discharge from the pots as they reach the bottom of the
revolving wheel, should be drawn off into the reservoir
before alluded to by means of a water-course or pipe.

The self-revolving machine [mentioned by _Lalla_, etc.]
which has a tube with its lower end open is a vulgar
machine on account of its being dependant, because that
which manifests an ingenious and not a rustic contrivance
is said to be a machine.

And moreover many self-revolving machines are to be met
with, but their motion is procured by a trick. They are
not connected with the subject under discussion. I have
been induced to mention the construction of these, merely
because they have been mentioned by former astronomers.

_Siddh[=a]nta Siroma[n.]i_, x