Tube Challenge!! - neon

[Toby Paddock]

Mark media at mail1.nai.net schematicized:

>Here is a sine neon tube oscillator:
>
>100V ----/\/\/----+----@@@@@@--------+
>         510K     |    L 100H        |
>                  |                  |
>                  +--( neon )---| |--+--/\/\/---| |---> ~100Hz
>                               .005      5.1M   .05
>

A neon lamp in a tank circuit? Cool. 
I'm a little lost (normal condition for me) how it works though.
Where is the power return?
This is interesting stuff. More please.

I love little blinking neons. Never built anything 
useful, just little blinking things.

 - -- -  Toby Paddock