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The 1840 Old Presque Isle Lighthouse. #Lighthouse #PresqueIsle #PureMichigan

The 1840 Old Presque Isle Lighthouse. #Lighthouse #PresqueIsle #PureMichigan

Lighthouse fresnel lens. French physicist Jean-Augustin Fresnel disproved Newton's particle theory by using Newton's calculus.

Lighthouse fresnel lens. French physicist Jean-Augustin Fresnel disproved Newton's particle theory by using Newton's calculus.

Fresnel Lens for Sale | Copyright © 2009 Maritime Exchange Museum. All rights reserved.

Fresnel Lens for Sale | Copyright © 2009 Maritime Exchange Museum. All rights reserved.

Longstone Lighthouse

Longstone Lighthouse

Inside the lighthouse in Owls Head, Maine. We have had the privilege of visiting here, just last summer! The view really does go on and on!

Inside the lighthouse in Owls Head, Maine. We have had the privilege of visiting here, just last summer! The view really does go on and on!

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