Spring lens cleaning at Portsmouth Harbor Light

Volunteers Bob Hancock (below left) and Peter Mason (below right), along with operations manager Jeremy D’Entremont, cleaned the fourth-order Fresnel lens in Portsmouth Harbor Light on Wednesday, April 18, using the Coast Guard’s prescribed methods and cleaning solution (distilled water, alcohol, and a tiny bit of Woolite!).

Bob Hancock polishing lensPeter Mason cleaning the lens

The lens dates to the 1800s and was created by the Henry-Lepaute Company of Paris.

lens photos before and after cleaningBefore and after cleaning