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Word: opals (lookup in dictionary) (lookup stats)
Dates: during 1882-1882
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Usage:

Lithology - Special subject : Quartz, Tridymite, and Opal (continued). Dr. Wadsworth. Museum of Comparative Zoology, 3 P. M. Lectures at the museum are open to teachers free...

Author: NO WRITER ATTRIBUTED | Title: BULLETIN. | 11/11/1882 | See Source »

Lithology. Special subject: Quartz, Tridymite and Opal. Dr. Wadsworth. Museum of Comparative Zoology, 3 P. M. Lectures at the Museum are open to teachers free...

Author: NO WRITER ATTRIBUTED | Title: BULLETIN. | 11/4/1882 | See Source »

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