Digest>Mar/Apr 2011

Photo Caption:

Lighthouse keeper John N. Hanson in 1947 is shown polishing the glass prisms in the 2,400 pound candlepower Fresnel lens at the Duluth Harbor South Breakwater Outer Lighthouse, which exhibited a fixed green light.
Back to the edition of: Mar/Apr 2011


Duluth Harbor’s Breakwater Lighthouses
Back to the edition of: Mar/Apr 2011

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