7197ss. [newspaper] A New Light-House. Maine Farmer. November 25, 1852
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7197ss. [newspaper] A New Light-House. Maine Farmer. November 25, 1852
7197ss. [newspaper] A New Light-House. Maine Farmer. November 25, 1852 . Short article notes that experiments by Professor Grant into the new Drummond light have been successful and a report is to be made to Congress. The Drummond light, the strongest artificial light known, can be seen by utilizing reflectors throwing a single ray, and by being rotated constantly, thus throwing a single flash. The advantages of the system include a considerable cost savings over the Fresnel light, the best in use. The writer claims that, where ordinary lighthouses are of little use in fog, Professor Grant’s system is so intense that they present the effect known as “heat lightning” as seen through a thick fog. Interesting early work on the subject. Full newspaper contains 4 large pages with articles of the day, light browning, 4 folds, light wear. (VG-). $9.