Digest>Mar/Apr 2017

Photo By:

 

Jerry Biggs

Photo Caption:

Close-up view of the 5th order Fresnel lens in the Kewaunee Pierhead Lighthouse. (1995 photo)
Back to the edition of: Mar/Apr 2017

Story:

Coast Guard To Remove More Fresnel Lenses
Back to the edition of: Mar/Apr 2017

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