Re: Light bulbs

[brian whatcott <inet@INTELLISYS.NET>]

At 23:23 8/21/99 -0700, Leigh wrote:
> At 19:41 -0700 8/21/99, David_Anderson wrote:
>
> > ...What about light bulbs?  They are thin, hot, and have
> > one atmosphere cross them?  I know.
>
> How do you know? I doubt that the pressure inside a light bulb gets
> as high as one atmosphere *guage pressure*. Are you thinking of a
> light bulb at very high altitude?
>
> Leigh

I expect Anderson had very early carbon filament lamps in mind.
 Like the one described by Swann's article in Scientific American
 that was available in Edison's lab. I think that one and other early
examples were evacuated, rather than back-filled with (some) nitrogen,
or with added halide traces too.


brian whatcott <inet@intellisys.net>
Altus OK