[Bloody Sam Roberts]

There is a huge Tesla spark generator in the Boston Museum of Science.

The Boston Museum of Science houses the Thomson Theater of Electricity which was built to house the original air-insulated Van de Graaff generator created by Robert Van de Graaff and donated to the Museum by the Massachusetts Institute of Technology in 1951.
Is this the beastie you were thinking of?

[Old Professer]

Tesla's unique coil had no armature; the VdG device is a motor-driven friction belt and requires brushes, something Tesla swore to rid electric motors of even after several improvements on their use.

[cloud8]

> Is this the beastie you were thinking of?

Ack! The Van de Graaff.

I was thinking of the Tesla coil, of course.

[whd23]

Is this the beastie you were thinking of?

Note that there are two Tesla coils that flank the Van de Graaff generator in the picture. It's all part of the show!