Date: Wed, 02 Mar 2005 15:24:37 -0600

Author: Gary Karshner

Subject: Re: Burning light bulb.


It is probably low temperature lead glass as it is easier to work
then pyrex. The conduction is caused by dissolved ions in the losing or
gaining na electron as the glass becomes liquid. Much as salt will dissolve
in liquid water but not ice.
Hope this helps.

At 04:31 PM 3/1/2005 -0500, you wrote:
>We've been doing the burn the filament thing for a while, now I have
>even better to do with the burnt-out broken bulbs before I toss them! Very
>cool demo. Anyone know what type of glass is used in the bulbs or better
>yet, the mechanism which starts conduction? Does this work with pure glass
>or pyrex?
>On Tuesday 01 March 2005 02:18 pm, Clarence Bennett wrote:
> > >Retrieve the screwbase and with pliers and wirecutters, trim off any
> > >shards of the bulb which remain attached, as well as the exposed metal
> > >filaments.
> >
> > I suggest leave the filament, to show it burning out in air.
> >
> > >Plug it in, ideally in series with another bulb, and plug the
> > >whole mess into the wall.
> >
> > Use two surface mount ceramic sockets.
>Mike Timmins
>University of Virginia
>Acadamic Support Supervisor
>phone: (434) 924-6800
>mail address:
>382 McCormick Rd
>Charlottesville, VA 22904
From Wed Mar 2 16:35:39 2005