Gilding of Copper among the Pre-Columbian Indians

Details Gilding of Copper among the Pre-Columbian Indians Gilding of Copper among the Pre-Columbian Indians

May 1938

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1938natur.141..829b&link_type=abstract

Nature, Volume 141, Issue 3575, pp. 829 (1938).

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Scientific paper

I HAVE already given an account1,2 of certain investigations regarding the metallurgical methods employed by the pre-Columbian Indians, especially their methods of procuring platinum in coherent form without fusing it, and I have demonstrated the metallurgical processes adopted by them in soldering by `sweating', wire-drawing, the plating of gold with platinum, etc. Further investigations have now disclosed the fact that the Indians, at any rate those in the Esmeraldas district, gilded their copper objects in a fashion which appears to have been completely unknown hitherto, both to the ancient world and to us. It was previously supposed that such gilding must have been carried out in America with the help of mercury. Although it has been impossible to demonstrate traces of mercury in any of the gilded objects, no other explanation has been suggested.

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