Re: Light bulbs

[David_Anderson <dfa@FNAL.GOV>]

Aren't we getting a little distracted whether light bulbs have a good
vacuum or not?  That really isn't the point.  The point is does glass flow
or not.

David Anderson
dfa@fnal.gov




On Sun, 22 Aug 1999, brian whatcott wrote:

> 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