- I've attached a photograph of the famed "Egg of
Columbus" -- a rotating field experiment that was on exhibit at the
World's Fair in 1893.
- The Egg was created by Nikola Telsa and consisted of
a complex polyphase field-coil located directly under a plate with a copper-plated
egg positioned on top of it. When power was applied in sequence to the
coils, the complex magnetic field arrangement not only inductively created
a high-spin on the egg, it also made it stand up on end -- appearing to
- The "Egg of Columbus" is famous for two reasons,
the first being that Tesla placed a substantial bet on being able to stand
an egg on end indefinitely in order to obtain venture capital for his
early enterprises, and second because the specific polyphase arrangement
of the magnetic fields shown in this device was said to also be the direct
precursor to the field-coils used in the Philadelphia experiment.