[time-nuts] Lifetime of glass containers

J. Forster jfor at quik.com
Mon Jun 15 17:26:18 EDT 2009


That COULD be an illusion. Old glass was not very uniform and I've been
told the artisans always installed it thick end down.

FWIW,
-John

=============


> Not to charge in, but I've looked at ordinary window pane glass in very
> old
> buildings and you can actually see the rippling effect that occurred over
> time, showing the "flow" of the glass toward the lower edge of the pane.
> One
> presumes that the panes were relatively uniform when installed 120 years
> earlier. Sounds liquid to me.
>
> Dave
>
> ----- Original Message -----
> From: "Hal Murray" <hmurray at megapathdsl.net>
> To: <time-nuts at febo.com>
> Sent: Monday, June 15, 2009 12:23
> Subject: [time-nuts] Lifetime of glass containers
>
>
>
> dave at uk-ar.co.uk said:
>> Or as someone else suggested, use a Glass container.   So long as you
>> don't want it to last for many 100's of years, as Glass is not a
>> solid, it is a "super cooled fluid" and as such it flows like Ice over
>> time, just that it takes much much longer to do so!
>
> As best as I can tell, the glass-is-a-liquid story is bunk.
>   http://en.wikipedia.org/wiki/Glass#Behavior_of_antique_glass
>
> I was going to ask if anybody had tried to measure it.  That seems like
> something a time-nut would know about.
>
> The astronomers have been running tests for years.  Their mirrors don't
> seem
> to sag enough to notice, and they are very good at noticing tiny
> distortions.
>
> --
> These are my opinions, not necessarily my employer's.  I hate spam.
>
>
>
>
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