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It is used by photography professionals viewing transparent films, such as slides. [2] This device was originally used to sort photographic plates with ease. When laid flat, it may be called a light table. Generally, a lightbox uses light similar to daylight (5,000–6,000 kelvins (K)) and has uniform light strength on the glass pane. [3]
Harbor Freight Tools, commonly referred to as Harbor Freight, is an American privately held tool and equipment retailer, headquartered in Calabasas, California. It operates a chain of retail stores, as well as an e-commerce business. The company employs over 28,000 people in the United States, [5] and has over 1,500 locations in 48 states. [6] [7]
Location: approaches to Green Bay, Wisconsin harbor: Coordinates: 1]: Tower; Constructed: 1935 [2]: Foundation: Concrete pier: Construction: Steel plate: Automated: 1979 [2]: Shape: white conical tower on cylindrical base: Light; Focal height: 72 feet (22 m): Lens: fourth order Fresnel lens: Range: 12 nautical miles (22 km; 14 mi): Characteristic: occ. red 4s: The Green Bay Harbor Entrance ...
The Baltimore Harbor Light, officially Baltimore Light and historically Baltimore Harbor Lighthouse is a privately owned caisson lighthouse in the Chesapeake Bay in Maryland. [ 2 ] [ 3 ] [ 4 ] First lit in 1908, it sits at the mouth of the Magothy River , marking the channel which leads northwest to the opening of the Patapsco River , which ...
According to US Government publication, "The American Practical Navigator", Chapter 5: "Range lights are light pairs that indicate a specific line of position when they are in line. The higher rear light is placed behind the front light. When the mariner sees the lights vertically in line, he is on the range line.
The rear light with its original 1849 birdcage lantern. The front range light. The Hyannis Rear Range Light, also known as the Hyannis Harbor Light, [1] was a lighthouse and, for part of its life, one of a pair of range lights adjacent to Hyannis Harbor. [2] The Range Rear tower was built in 1849 and equipped with a 5th order Fresnel lens in 1856.
They were completed in 1866 and served for 40 years. In 1903 the light was moved from the old lighthouse to a free-standing 120-foot steel tower, and the tower of the old lighthouse was capped with a hip roof. [4] [2] The life-saving station was added in 1903, a 2-story building with a 3-story square, pyramidal-roofed lookout tower.
The Grand Marais Harbor Inner and Outer lights area pair of lighthouses located on the Grand Marais pier, 2,610 feet (800 m) apart. [10] Both are prefabricated skeletal iron or steel structures painted white and bolted to the pier. [6] The outer light is 34 feet (10 m) tall and the inner light is 55 feet (17 m) tall. [3]
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