[SEL] Early Switchboard Meters and Switchgear

[John Culp]

Yep! And in a number of languages, (like Russian and Spanish, that I've 
noticed), a "tube or "valve" is still called a "lamp."

John

On Jul 18, 2005, at 2:26 PM, bill at antique-engines.com wrote:

> Wasn't it Edison who really observed the effect but didn't take or have
> the time to work with it - and basically the structure of a light bulb
> became the basis for the first "valve" - so called because of the 
> one-way
> flow of electrons.


John Culp
Bristol, Tennessee, USA