RE: [at-l] PB Question

Chemically, glass is considered a super-cooled liquid, not a solid. This is
standard window type glass we are talking about here. Crystal is a different
animal.

Lee I Joe

> -----Original Message-----
> From: owner-at-l@backcountry.net [mailto:owner-at-l@backcountry.net]On
> Behalf Of ARTCLOUTMN@aol.com
> Sent: Thursday, November 23, 2000 10:41 AM
> To: garyticknor@starpower.net; at-l@backcountry.net
> Subject: Re: [at-l] PB Question
>
>
>
> In a message dated 11/23/00 12:02:09 AM,
> garyticknor@starpower.net writes:
>
> << I believe glass is a liquid at room temps - just highly
> viscous - but
> still a
> liquid. Cathedral windows from the Middle Ages show a
> thinning or hole in the
> center where the glass has flowed down and towards the edges.
>  >>
>
> Is it really a liquid?  Glaciers flow over long periods of
> time.  Steel flows
> but we don't think of it as a liquid.  Isn't it the rate at
> which it flows
> that determines if it is a liquid?  Or is it the motion of
> molecules in the
> chemical or compound that determines whether it is a solid or liquid?
>
>                                         Art
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