4th Order Fresnel Lens

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This lens  was used in the Pomham Rocks Lighthouse from c.1926-1974. It was display at the Custom House Maritime Museum in Newburyport, Massachusetts since its removal from Pomham Rocks Lighthouse in 1974. It was returned to the Pomham Rocks Lighthouse on September 1, 2021 and is now on display in the lighthouse’s parlor.


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