and in the case ...
... it does not work, we should
probably follow our ancestor Thomas Alva Edison. He tried to build a machine
to register the voice of ghosts and spirits and accidentally invented the
phonograph. Would placing this little sign really harm physics ...
Figure C.1 The magic seal of king Solomon to
detain bad ghosts 
Or following an article written
by Martin Growled for Australian Electronics Engineering :
Put everything in metal boxes ... no, lead
boxes - two lead boxes, in fact.
Don't make anything electric, use steam.
But not for the European market because of the Simple Pressure Vessels
Don't make anything with wires which connect
to anything else. Communication should be by semaphore, hydraulics or string.
If you must use electricity, earth everything
- even signal lines.
Use metal connectors, metal shells, metal
switches, metal fasteners; solder them all together and earth everything.
Put ferrites on everything, even string.
Don't use electric motors. Use mice in little
cage wheels. Put earth straps on the mice.
Don't have any ventilation holes. They allow
RF energy to escape from the enclosure. I know it's bad for the mice, but
we live in a disposable age, after all.
Bond everything to an earth plane - portable
devices have the potential to generate way too much interference anyway.
Don't have any removable parts - they compromise
the integrity of the enclosure. Mice should be sealed in at the time of
manufacture. This stops pooh getting everywhere too.