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This vintage photo of the Chicago Harbor Lighthouse shows some type of structure attached to the top of the tower. We don’t know the year of the photo, nor do we know what it is that is attached to the top of the tower, but most likely it was associated with some type of experimental fog horn system.
This story appeared in the
Mar/Apr 2015 edition of Lighthouse Digest Magazine. The print edition contains more stories than our internet edition, and each story generally contains more photographs - often many more - in the print edition. For subscription information about the print edition, click here.
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