A simple new technique based on an old
discovery can be used to control the orien-
tation of an object levitated acoustically in

in 1722, says that many people who were
terrified of the plague acted as if it was an
evil spirit which threatened to take pos-
session of their bodies.

be taken without much ceremony. The
member merely undertook further obli-
gations, such as to

to cure fevers. The earliest instructions for
using it come from a poem on medicine by

communications at ultra-
high frequencies.

This mutual espionage was a
feature of all the Illuminati grades.

They tried to ward it
off with 'certain words or figures,

had to swear an oath binding
o complete secrecy and unconditional
ence to his superiors.
extraordinary system of mutual
nage was introduced

on the
levitated object by the reflected sound con-
trols the orientation of the object.

Nothing of the sort happened and
two years the total number of Illuminati
ot amount to more than a score.

ded on 1 May 1776 with five members,
f whom received fanciful pseudonyms.
haupt became known for Order

The idea is evidently that as the word
shrinks away to nothing,

and then thrown back-
wards over the shoulder into a stream which
runs eastwards.

The candidate was
taken at night to a dimly lit room where he
was received by an unknown individual who
asked him certain questions. Provided that
satisfactory answers were given, a password
and certain secret signs were communicated.

based in
part on the fact that whereas the change in

area pointing along the direction of propa-
gation of the sound. This principle can be
exploited to the control of

Several other shrinking charms of this kind
are known, including a

finally produced
eme of organization and a 'curriculum'.

Order was now to consist of three grades:
cending order of seniority those of

The Doppler shift

has been so
widely used in magic that it has passed into
the patter of the stage

d, upon learning that they would be
ed the mysteriuos title of Areopagite.

errors in situations in which the
carrier frequency is uncertain and signals
are transmitted in bursts that are too short
to allow

The reflecting object acts as a second
source of sound.

with the levitated object to
obtain different orientations. Alternatively

or focuses the reflected sound

The seven
may stand for the seven
planets known in antiquity, believed in
astrology to control the workings of fate.