Reports

Uranium Contents of Ancient Man-Made Glass

Science  15 May 1964:
Vol. 144, Issue 3620, pp. 841-842
DOI: 10.1126/science.144.3620.841

Abstract

The concentrations of uranium impurities in a variety of ancient man-made glasses have been determined by counting the sites of neutron-induced fissions. There appears to be a chronological trend from low to high and back to low uranium contents over the past three millennia. Crude estimates of ages by fission-track counting should be possiblewith considerable labor for the group of glasses which was found to have the highest concentration of uranium.

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