Indicator tubes for transistor logic machines.

[Tony Duell]

> 
> Dave McGuire wrote:
> 
> >   This is the way I learned it, and I'm in the US.
> Forget electrcity ... Have a torch heated valve. :)

I'd love to see you keep that flame burning while having a sufficienltly 
low gas pressure around the cathode to have a long enough mean free path 
for the electrons, Not to mention problems caused by the ions geenrated 
by said flame.

-tony