Abstract
ON Saturday, October 22, an evening lecture on this subject was delivered by Dr. A. E. Foote, of Philadelphia, in the Trophy Hall of the American Exhibition. The speaker was introduced by Mr. F. W. Rudler, the President of the Geologists' Association.
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Gems and Ornamental Stones of the United States . Nature 37, 68–69 (1887). https://doi.org/10.1038/037068a0
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DOI: https://doi.org/10.1038/037068a0