Old post cards showing a fog horn like this at a lighthouse are quite rare. This one, in the archives of Lighthouse Digest, is of the fog signal building at Bakers Island Lighthouse in Massachusetts where there were once two lighthouses that were not twins; only one of the towers stands today. After island residents complained about the loudness of the fog horn, the government installed this large megaphone style horn in 1907 to do a better job of sending the sound directly out to sea.
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