Re: Copper Casting In America (Trevelyan)

From: Gary Coffman (ke4zv_at_bellsouth.net)
Date: 06/27/04 

Date: Sun, 27 Jun 2004 03:11:14 -0400

On Sat, 26 Jun 2004 11:13:49 +1200, Eric Stevens <eric.stevens@sum.co.nz> wrote:
>On Wed, 23 Jun 2004 23:46:01 -0500, Tom McDonald
><tmcdonald2672@charter.net> wrote:
>> In the case of the copper artifacts in the upper Great Lakes
>>area, all of the shapes and structures have been shown to have
>>been made via cold and hot-working techniques.
>
>This is not my understanding. Metallurgical examination has shown that
>some of the artifacts have been cast.

The evidence brought out in this thread is that *one* copper artifact
shows radiographic evidence (characteristic porosity) for part of it
being heated above the melting point in atmosphere at some point.
That is in no way conclusive evidence of casting technology. The
piece may have been an attempt at casting, or it may simply have
been overheated while being worked.

Gary

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