examination) are routinely made by breaking plate glass (newer knives may
be made of diamond).
http://www.2spi.com/catalog/knives/glass.shtml
http://www.pelcoint.com/glass_html/glassacc.htm
And here I thought that Babbage's method was meant to be a joke.
Gordon
At 09:18 7/28/03 -0600, Rodn
In ~1988, I attended a lecture at the University of Colorado on the topic
of breaking glass. A professor there had studied the subject in depth. I
think he was an archeology professor who started by studying how Native
Americans made arrowheads (obsidian being very similar to glass). He
might h
On Mon, 28 Jul 2003 [EMAIL PROTECTED] wrote:
> Andrew James wrote:
>
> >According to Charles Babbage in his autobiographical "Passages from the
> >Life of a Philosopher" (I think, or possibly the "Ninth Bridgwater
> >Treatise" - it's many years since I read it) there is a simple technique
> >for
ents for some companies
are reluctant to order small quantities.
Cheers, John
[EMAIL PROTECTED]
- Original Message -
From: <[EMAIL PROTECTED]>
To:
Sent: Monday, July 28, 2003 5:15 PM
Subject: Re: Re: SGS Gnomon Attachment
> The 'glue' used to stick car mirrors is act
Andrew James wrote:
>According to Charles Babbage in his autobiographical "Passages from the
>Life of a Philosopher" (I think, or possibly the "Ninth Bridgwater
>Treatise" - it's many years since I read it) there is a simple technique
>for making a neat hole in a glass sheet using only a centre p
/ package
size was way beyond my means and needs. Even the agents for some companies
are reluctant to order small quantities.
Cheers, John
[EMAIL PROTECTED]
- Original Message -
From: <[EMAIL PROTECTED]>
To:
Sent: Monday, July 28, 2003 5:15 PM
Subject: Re: Re: SGS Gnomon Att
Folks,
Don't dismiss Tony Moss' suggestion of the glues used on car mirrors. It is
pretty good stuff, I only wish I could find out what it is! It will
withstand air temperatures of > 40C and continual exposure to direct sun for
years.
Some advice from having to replace a stick-on car aerial for
>I wonder what method the glassers use to drill glass? <
>John L. Carmichael Jr.<
According to Charles Babbage in his autobiographical "Passages from the
Life of a Philosopher" (I think, or possibly the "Ninth Bridgwater
Treatise" - it's many years since I read it) there is a simple technique
fo
Message text written by INTERNET:sundial@rrz.uni-koeln.de
>I'm going to try to drill a hole the same way I drill holes in stone using
a high speed diamond sphere with H2O.<
That should work fine, John. It's really no different to drilling ceramic
floor or wall tiles - though of course they can b
The 'glue' used to stick car mirrors is actually a very strong double sided
sticky pad. Available from replacement car windsrceen fitters.
David.
>
> From: "John Carmichael" <[EMAIL PROTECTED]>
> Date: Fri 25/Jul/2003 17:52 CEST
> To:
> Subjec
Message text written by INTERNET:sundial@rrz.uni-koeln.de
>ut, you know what I'm gonna do? I'm going to try to drill a hole the
same way I drill holes in stone using a high speed diamond sphere with
H2O.<
Suggestion: do it actually under water!!
Patrick
-
Tucson Arizona 85718
USA
Tel: 520-696-1709
Email: [EMAIL PROTECTED]
Website: <http://www.sundialsculptures.com>
- Original Message -
From: <[EMAIL PROTECTED]>
To: "Sundial Mail List"
Sent: Friday, July 25, 2003 8:14 AM
Subject: Re: SGS Gnomon Attachment
> John
John Carmichael asked:
>
>What do you think is the best method to attach a metal rod gnomon to a
>stained glass sundial window?
>
>It's the most frequent question I've been getting from the "Glassers". I
>do have an article that Mike Cowham sent me that mentions that in the
>seventeenth century
John & all -
My slottted shade designs and others did not have insertionpoints on the
glass of either window or skylights. As a result, a frame around the
window is a natural and structurally safe result.
Claude Hartman
Sunlight Designs
35.13N 120.58W
John Carmichael wrote:
> Hi Tony & other
A
Tel: 520-696-1709
Email: [EMAIL PROTECTED]
Website: <http://www.sundialsculptures.com>
- Original Message -
From: "Patrick Powers" <[EMAIL PROTECTED]>
To:
Sent: Wednesday, July 23, 2003 2:06 AM
Subject: SGS Gnomon Attachment
> Message text written by INTERNET:sund
Message text written by INTERNET:sundial@rrz.uni-koeln.de
>What is the best method to attach a metal rod gnomon to a stained glass
sundial window?<
Two methods have been used down the years. The first is to secure the
gnomon by stays that are soldered (or otherwise fixed) to the edges of the
win
Hi Tony & others,
What do you think is the best method to attach a metal rod
gnomon to a stained glass sundial window?
It's the most frequent question I've been getting from the
"Glassers". I do have an article that Mike Cowham sent me that mentions that in
the seventeenth century, a thre
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