From: Jim Thompson
Subject: Re: O.T. Math help
References: <3DC7C3FF.7ABC2433@webaccess.net> <3DCB3310.C806A8AE@rica.net> <%0wz9.21822$Ku.firstname.lastname@example.org>
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Date: Sun, 10 Nov 2002 20:55:59 GMT
NNTP-Posting-Date: Sun, 10 Nov 2002 15:55:59 EST
Organization: Cox Communications
On Sun, 10 Nov 2002 19:39:58 GMT,
"Michael Painter" ,
In Newsgroup: sci.electronics.design,
Entitled: "Re: O.T. Math help",
Wrote the following:
|"James Meyer" wrote in message
|> On Sun, 10 Nov 2002 17:16:21 GMT, Jim Thompson
|> >"Mike" ,
|> >Wrote the following:
|> >|He also states that the estimated time for a 1m tall, 1cm thick sheet of
|> >|glass to flow enough to thicken the bottom of the pane by 10A is roughly
|> >|billion years.
|> >|-- Mike --
|> >I certainly can't debate the technology issues, but I've seen the
|> >windows; and any tour of old sites, such as Williamsburg or Jamestown,
|> >will have a tour guide or a placard noting the flow of glass.
|> > ...Jim Thompson
|> Where else would you expect to see an "old wives tale" than an old site
|> like Williamsburg or Jamestown?
|> Besides, if I were an ancient glazier I think I would set a pane of
|> glass that already happened to have a thick edge with the thick edge at
|> bottom of the opening. It would only make sense to put the strongest part
|> the bottom.
|Possibly. It just occurred to me that nobody every talks about the material
|at the top of the glass being thinner or the ripples in the glass changing.
|You may be right about putting the thick side down, but I wonder if some or
|all the edges might be thick?
I don't know who to ask... my really old relatives keep dieing :-(
(I had a great aunt, died at age 108 when I was 16... she could
remember Lincoln coming thru on the campaign train when she was a
But I have to ask... what makes you think 1600's era glass was the
same as today's? The windows I saw were cloudy, perhaps implying a
glass somewhat less pure than we know today, and probably made at a
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| Jim-T@analog_innovations.com Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
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