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OldChE: Fresnel brothers
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OldChE: Fourth-order Fresnel lens, Old Mackinac Point Light Station
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OldChE: A visit to Barnegat Lighthouse
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OldChE: South Pierhead Light (1903)
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OldChE: St. Joseph range lights, from the beach
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OldChE: St. Joseph North Pier Lights (1907).
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OldChE: Split Rock Lighthouse (1910)
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OldChE: Kilauea Point Lighthouse (1913)