"Reid Goldsborough" wrote in message
...
On 11/17/2010 1:08 AM, Jeff R. wrote:
Reid, find*one* - just ONE - individual with genuine experience and/or
qualifications in metal working and/or metallurgy who agrees with your
hypothesis.

You ridiculed me for using the term "plastic deformation" to describe the
process though which the surface metal of a coin is softened

....and I still do.

...and moved through whizzing, saying the physics of this is impossible.
But this is the same term used to describe whizzing by Tony Clayton, a
former physics teacher who maintains a Web site on coin metals.

Now just a minute, Reid.
How come you can cite Tony's status as "former physics teacher" as a
sufficient guarantee of accuracy, yet you automatically dismiss my status
as current engineering teacher as irrelevant?

..As he said: "What does occur is plastic deformation of the surface
layers. This will result in surface metal being moved, in just the same way
as drawing a knife across the surface will result in a scratch with the
moved material forming a narrow raised area on each side."

Sigh.
You don't bother reading do you?
Look again at the diagrams at the base of the "conclusions" page I wrote
seven years ago, where this effect is demonstrated and explained.

*HINT*: its a *micro* effect, yet you are claiming *macro* consequences.


Allen Stockton, a coin doctor, someone who unlike you actually worked on
coins BEFORE you made your grand conclusions about what happens when
they're worked on, also says metal is moved.

So he is also wrong. So what?

So has PCGS

Written by Rick Montgomery? LOL!

...in its book Coin Grading and Counterfeit Detection, Brian Silliman of
NCS (Numismatistic Conservation Services) in his Numismatist column and the
ANA in its book A.N.A. Grading Standards for United States Coins. Yes.

You forgot to mention Rick Montgomery. Again.
Why is that?

Look Reid - coin graders and salesmen are not metallurgists. I don't know
squat about grading US coins on the 70 point scale, and they plainly know
just about the same about the mechanics of shaping metals (if they agree
with you, that is).

You're correct. This is all just my "hypothesis." Or was it what you said
before, that all these people are just copying one another, and unlike you
none of them has a metal shop? Ad infinitioticdum. Like talking to a brick
wall and with the same intelligence. Bye.

What?
You're giving up again?
Lacking endurance as the years creep by, eh Reid?

Its such a shame that you cannot advance one single credible argument to
suggest that whizzing is anything other than an abrasive process.

I no longer expect an apology for your rudeness, (you're too rude for that),
but I gladly accept your admission of defeat.

Au revoir indeed.

--
Jeff R.