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Wisconsin
Surface Find Artifacts Show
Xeroradiographic Evidence Of Casting
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Two Views of Wisconsin Banner Cresent
These two views of an "Old Copper" copper banner cresent from Manitowoc County, Wisconsin (from the collection of the Milwaukee Public Museum #43408/11996) show evidence of casting, accoridng to Ellis J. Neiburger. The arrow points to "suck-back voids caused by turbulence and contraction of the motlen copper when poured (arrow). The position, depth and circular shape of the voids cannot be created by wrought working," he said.
Comparison
Of Three Spears Shows
Casting, Wrought Working Evidence
These three copper artifacts reveal both casting and wrought working evidence, according to Ellis Neiburger, who says "Point a has irregular and elongated voids which are diagnostic for wrought work only manufacture. Points b and c have many small casting bubbles typical of cast manufacture. Point c displays casting bubbles (small arrows) along with a fold (large arrow) on the bottom indicating both casting and wrought work.". While all three of these native copper objects are surface finds, they are presumed to be prehistoric.
Surface.htm
Posted 12-4-01
