1185. (photo) Fourth Order Fresnel Lens, Drum Point Lighthouse c1983.
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1185. (photo) Fourth Order Fresnel Lens, Drum Point Lighthouse c1983.
1185. (photo) Fourth Order Fresnel Lens, Drum Point Lighthouse c1983. Clear, close original 7” x 9” press photo shows great detail of the large fourth order lens with John Hansen pointing out details. Drum Point Light is one of three surviving Chesapeake Bay screw-pile lighthouses. Originally located off Drum Point at the mouth of the Patuxent River, it is now an exhibit at the Calvert Marine Museum. Built in 1883, Drum Point Light originally housed a fourth-order Fresnel lens whose red light could be seen at a distance of eleven nautical miles. Photo is b/w and includes date and credit line and description on back, some cropping marks. Dated August 18, 1983. Clear and close view. (VG+). $54.