Digest>Jul/Aug 2016

Photo By:

 

Brian Herrmann

Photo Caption:

When the 4th order Fresnel lens was still in use at the Cape Disappointment Lighthouse, as shown here, it produced an alternate red and white flash spaced by fifteen seconds.
Back to the edition of: Jul/Aug 2016

Story:

Servicing Cape Disappointment Lighthouse
Back to the edition of: Jul/Aug 2016

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