It's not always thicker at the bottom! Where is this phenom. observed? Are
you saying all the plate glass, that has been sitting in windows for a
hundred years (like the windows I restore every day) have thicker bottoms. I
can assure you that is not the case. I have been doung glass since May of
'61 and I have not seen "that it's thicker at the bottom'. Because the
condition doesn't exist. I would love to be shown somewhere that all the
glass is thicker at the bottom.
jh
----- Original Message -----
From: "Hammarberg, Eric" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, September 02, 2003 11:53 AM
Subject: Re: Folk history question II
> but why is it always thicker at the bottom?
> I thought it was from slow creeping of a super cooled liquid (glass)
>
>
> Eric Hammarberg
> Director of Preservation
> Sr. Associate
> LZA Technology
> 641 Avenue of the Americas
> New York, NY 10011-2014
> Telephone: 917.661.8160 (Direct)
> Mobile: 917.439.3537
> Fax: 917.661.8161 (Direct)
> email: [log in to unmask]
>
>
>
> -----Original Message-----
> From: [log in to unmask] [mailto:[log in to unmask]]
> Sent: Tuesday, August 26, 2003 9:29 AM
> To: [log in to unmask]
> Subject: Re: Folk history question II
>
>
> "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?"
>
> I've heard that before, but I was generally under the impression that
window
> glass was thicker on one side than the other because of the way it was
> processed. Cones of glass were rolled out in a circular pattern-- the
glass
> on the edge rolled thinner than the glass in the center; thus, early
window
> glass tends to be thicker on one side than the other.
>
> This seemed borne out by the marks in the glass where I used to work (c.
> 1750 farmhouse). All the early glass was rippled in slightly curved waves.
>
> -Heidi
>
> --
> 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>
>
> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
> The information in this email and any attachments may contain
> confidential information that is intended solely for the
> attention and use of the named addressee(s). This message or
> any part thereof must not be disclosed, copied, distributed or
> retained by any person without authorization from the addressee.
> If you are not the intended addressee, please notify the sender
> immediately, and delete this message.
> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
>
> --
> 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>
|
