Philosophumena; or, The refutation of all heresies, Volume I
David Hume · en
10. But they show the moon and stars appearing on the ceiling in this
way. Having previously arranged in the centre part of the ceiling a
mirror, and having placed a bowl filled with water in a corresponding
position in the middle of the earthen floor, but a lamp showing
dimly[148] has been placed between them and above the bowl, he thus
produces the appearance of the moon from the reflection by means of the
mirror. But often the magician hangs aloft[149] near the ceiling a drum
on end, the same being kept covered by the accomplice by some cloth so
that it may not show before its time; and a lamp having been put behind
it, when he makes the agreed signal to the accomplice, the last-named
takes away so much of the [Sidenote: p. 110.] covering as will give a
counterfeit of the moon in her form at that time.[150] But he anoints
the transparent parts of the drum with cinnabar and gum....[151] And
having cut off the neck and bottom of a glass flask, he puts a lamp
within and places around it somewhat of the things necessary for the
figures shining through, which one of the accomplices has concealed on
high. After receiving the signal, this last lets fall the contrivances
from the receptacle hung aloft, so that the moon appears to have been
sent down from heaven. And the like effect is produced by means of
jars in glass-like forms.[152] And it is by means of the jar that the
trick is played within doors. For an altar having been set up, the
jar containing a lighted lamp stands behind it; but there being many
more lamps (about), this nowise appears. When therefore the enchanter
invokes the moon, he orders all the lamps to be put out, but one is
left dim and then the light from the jar is reflected on to the ceiling
and gives the illusion of the moon to the spectators, the [Sidenote:
p. 111.] mouth of the jar being kept covered for the time which seems
to be required that the image of the crescent moon may be shown on the
ceiling.
11. But the scales of fishes or of the “hippurus”[153] make stars seem
to be when they are moistened with water and gum and stuck upon the
ceiling here and there.
12. And they create the illusion of an earthquake, so that everything
appears to be moving, ichneumon’s dung being burned upon coal with
magnetic iron ore[154]....
13. But they display a liver appearing to bear an inscription. On his
left hand (the magician) writes what he wishes, adapting it to the
enquiry, and the letters are written with nut-galls and strong vinegar.
Then taking up the liver, which rests in his left hand, he makes some
delay, and it receives the impression and is thought to have been
inscribed.