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Brass crucifix LaSalle Co., ~ 300 years old
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Compare the size of ancient corn cob with modern-day corn.
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James and Ralph Clews Pottery
Staffordshire, England
1815-1834
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Photoelectric relay made at Yerkes Observatory, Williams Bay, Wisconsin, with the cooperation of the General Electric Co., and photoelectric cells by R. J. Cashman and W. S. Huxford, 1933. Courtesy of the Adler Planetarium.