Have we done this bit yet? I fell asleep.......
Rapunzel
=================
In article <Pine.OSF.3.96.980727...@a5.ph.gla.ac.uk>,
the
moving finger of fla...@a5.ph.gla.ac.uk wrote...
>Well, we were always taught that glass was a supercooled liquid, that
>tended to want to crystallise with age, and that this was what
>accounted for old glass being more brittle (over the course of many
>decades, I mean). I'm surprised that you didn't even mention that
>issue. Comments?
>
Yes, glass does sag with age, I have a friend who arranged a sheet of
glass
on the points of several nails and then piled bricks on top. Over the
course of about 10 years the nails pushed through the glass.
I am not sure if any significant crystallisation takes place though, the
structure is certainly metastable thermodynamically but actually making
crystalline glass (such as the glass cwramics) is quite difficult, you
need
to seed the material with nucleation sites or perform cunning heat
treatments.
--
ap
Helge Moulding
> Found on uk.d-i-y
Ah well. "I have a friend" is about as voracious as "this is my
grandmother we're talking about", I suppose.
--
Helge "More proof of the futility of it all." Moulding
mailto:hmou...@mailexcite.com Just another guy
http://www.geocities.com/Athens/1401 with a weird name
H Gilmer
: Yes, glass does sag with age, I have a friend who arranged a sheet of
: glass
: on the points of several nails and then piled bricks on top. Over the
: course of about 10 years the nails pushed through the glass.
You could do this with wood, too. What's your point?
Hg
David Cogen
> glass
> on the points of several nails and then piled bricks on top. Over the
> course of about 10 years the nails pushed through the glass.
Sorry, but you don't. You or he is lying, or have dreamt it.
It won't hapen in 10 years, or 100 years, or 1000 years, or 10000 years. I'm
not so sure what happens in 100000 years or longer; I wouldn't be surprised if
it takes "billions and billions" though, or longer.
(Usually I just killfile any thing with this subject in it. Forgive me; this
time I couldn't let it pass. "A friend." Sheesh.)
Bob Ward
Sounds like you have a pretty candy-ass killfile, if you have to
decide on a case-by-case basis which articles go into it.
Mike Holmans
>> Yes, glass does sag with age, I have a friend who arranged a sheet of
>> glass
>> on the points of several nails and then piled bricks on top. Over the
>> course of about 10 years the nails pushed through the glass.
>
>
>Sorry, but you don't. You or he is lying, or have dreamt it.
>
>It won't hapen in 10 years, or 100 years, or 1000 years, or 10000 years. I'm
>not so sure what happens in 100000 years or longer; I wouldn't be surprised if
>it takes "billions and billions" though, or longer.
>
>(Usually I just killfile any thing with this subject in it. Forgive me; this
>time I couldn't let it pass. "A friend." Sheesh.)
>
thread was headed "Found on uk.d-i-y" and the rest of it was quoted
material. Although he doesn't post here on a daily basis, he's
frequented AFU enough to know that we can be interested by particularly
silly Flowbie nonsense, and the subject line ought to give a fair clue
to that as well. It's merely an invitation to say why this particular
silliness proves nothing.
Mike "sounds like an experiment one could perform in a shed" Holmans
--
Junior Bloody Club Member
Member - League Against Cruel Cats
H Gilmer
: >
: Let's be quite clear that Dave Budd's article at the beginning of the
: thread was headed "Found on uk.d-i-y" and the rest of it was quoted
Let's be quite clear that it was headed "Found on uk.d-i-y" and then
had a paragraph that was obviously quoted with ">" and an attribution,
and a response that wasn't. It wasn't all that unreasonable to assume
(for those of us who don't keep exact tabs on who's regular and who's
ir-) that the non-">", non-attributed part was his own response.
Hg
Tyghress
>Ah well. "I have a friend" is about as voracious as "this is my
>grandmother we're talking about", I suppose.
my, my my....what big teeth she must have...... and that's the truth
Jim Garnett
> You could do this with wood, too. What's your point?
Oh shit, that means wood is a liquid.
Jim
--
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Mike Holmans
>H Gilmer wrote:
>
>> You could do this with wood, too. What's your point?
>
>Oh shit, that means wood is a liquid.
>
Bottle the witch?
Drink the witch?
Mike "which?" Holmans
--
"Well, you're unusual, Michael" - Alice Faber
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