Re: Copper Casting In America (Trevelyan)

From: Eric Stevens (eric.stevens_at_sum.co.nz)
Date: 07/02/04 

Date: Sat, 03 Jul 2004 10:44:04 +1200

On Fri, 02 Jul 2004 13:37:36 GMT, Seppo Renfors <Renfors@not.com.au>
wrote:

>
>
>Tom McDonald wrote:
>>
>> Seppo Renfors wrote:
>>
>> >
>> > Gary Coffman wrote:
>> >
>> >>On Tue, 29 Jun 2004 05:48:01 GMT, Seppo Renfors <Renfors@not.com.au> wrote:
>> >>
>> >>>Gary Coffman wrote:
>> >
>> >
>> > [..]
>> >
>> >>>>Again, porosity is the problem, and that should show up on
>> >>>>radiographs, as it does for R666 (which certainly shows evidence
>> >>>>of being melted in atmosphere, though not necessarily evidence
>> >>>>of being cast), but none of the other artifacts presented show
>> >>>>that sort of porosity.
>> >>>
>> >>>See:
>> >>>http://www.iwaynet.net/~wdc/copper.htm
>> >>>
>> >>>The 4th and 5th pictures down.
>> >>
>> >>Those pictures do not show any evidence of the characteristic
>> >>porosity copper casting would produce.
>> >
>> >
>> > They disagree with you as it states "The casting bubble can clearly
>> > been seen...."
>> >
>>
>> Gary showed that the porosity typical of pure cast copper is
>> not present in that artifact. He even explained in just below.
>
>Please point out the "porosity" in this sample:
>
>Two copper pigs:
>http://people.uncw.edu/simmonss/P6030052.JPG
>
>The casting is obvious in this:
>http://people.uncw.edu/simmonss/LA_1240-1.4.jpg
>
>Both pictures show melted copper - pre Colombian melted copper! It
>leaves Gary's statements hanging in the air.
>
>However if one considers that "bubbling" has been claimed to be caused
>by "overheating" in a annealing process - then it is saying "melted"
>at the same time, as it cannot bubble UNLESS a portion of it is
>melted. Also "welding" requires the melting of the metal - or so
>goddamned close to it that the friction heat generated by a blow on it
>does melt the metal.

Reasonably pure copper can be welded at ambient temperatures merely by
pressure. MIllions of electrical connections rely on this property.

>
>Those are two logical examples of melting occurring - the knowledge of
>melting copper existed. It beggars belief that scraps and off cuts
>were NOT melted when the process must have been known to them. That
>people suggest they would rather go and do hard manual labour another
>day to find a piece "just right" for the job, when it is right there,
>right now, right before them. All they have to do is melt it into one
>lump.
>
>The implied suggestion they would rather do the hard labour, and not
>proceed with the easier option available immediately to them, isn't
>consistent with known human behaviour.
>
>[..]
>
>
>SIR - Philosopher unauthorised
>-----------------------------------------------------------------
>The one who is educated from the wrong books is not educated, he is
>misled.
>-----------------------------------------------------------------

Eric Stevens

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