Next| Block Island Southeast Lighthouse's 1929 First Order Fresnel lens |
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| Courtesy of the Library of Congress and Historic American Engineering Record, National Rark Service, Lee Ann Jackson, 1988 |
| Block Island Southeast Lighthouse's 1929 First Order Fresnel lens |
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| Courtesy of the Library of Congress and Historic American Engineering Record, National Rark Service, Lee Ann Jackson, 1988 |
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