TRANSPORTATION · HISTORICAL MARKER

First Order Fresnel Lense

Transportation
7
Tybee Lighthouse was re-classified as a major aid to navigation in 1866, and a First-Order Fresnel lens was installed in 1867. The lens, with a height of 9 feet and a 6-foot diameter, has 320 glass prisms. Lard was used to keep the light lit in 1867, kerosene in 1887, and electricity in 1933.
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Tybee Island, Georgia · United States
Tybee Island, Georgia
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