Truely nutso. Glass isn't a liquid but is a non cristaline solid which is
why you can "cut" it with a glass "cutter" (wheel). The score that the wheel
makes, makes a fault line that doesn't get interupted by crystaline
interfaces. So if you score a 1/8" or 1" piece of glass, and shock the fault
(tap on reverse side of score with sharp metal tool) the glass seperates at
that fault line. Try that with any other solid. *Water is also non
crystaline but when it does become solid is crystaline.
The reason some glass is thicker on the bottom is because glass made in the
olden days was hand blown, twirled, slit and layed on metal slab to flatten
then put back into kiln to anneal. Glass was of uneaven thickness (sometimes
a lot, for different reasons among which is artistic affect) and is glazed
into openings in a random manner so that some pieces will be thicker on
bottom and some on side and some top.
You wont notice any "thickening" of the bottom of sheets of float glass
(named cause molten glass is floated on molten tin to eliminate the need for
polishing, hence the old term "polished plate")
jh
----- Original Message -----
From: "mitch wilds" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, August 11, 2003 2:51 PM
Subject: Folk history question II


> Rudy Christian wrote:
>
> >  I guess we won't be nailing the lid on that bit of folklore's coffin
> > quite yet eh?
> >
>
> So have you heard the one about old window glass being thicker at the
> bottom edge because glass is actually a liquid affected by gravity?
> True or nutso?
> Mitch
>
>
> --
>
> F. Mitchener Wilds, Senior Restoration Specialist
> Restoration Branch
> State Historic Preservation Office
> 919/733-6547
> http://www.hpo.dcr.state.nc.us
>
> ***My opinions may not be those of my agency.***
> --------------------------------------------------------------------------
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>
> E-mail to and from me, in connection with the transaction of public
> business, is subject to the North Carolina Public Records Law and may be
> disclosed to third parties.
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>
> --
> To terminate puerile preservation prattling among pals and the
> uncoffee-ed, or to change your settings, go to:
> <http://maelstrom.stjohns.edu/archives/bullamanka-pinheads.html>
>
>

--
To terminate puerile preservation prattling among pals and the
uncoffee-ed, or to change your settings, go to:
<http://maelstrom.stjohns.edu/archives/bullamanka-pinheads.html>