20383b. NATURE’S SUBMARINES – How We Guard Our Commerce Against Them. Scientific American Supplement. November 2, 1918.
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20383b. NATURE’S SUBMARINES – How We Guard Our Commerce Against Them. Scientific American Supplement. November 2, 1918.
20383b. NATURE’S SUBMARINES – How We Guard Our Commerce Against Them. Scientific American Supplement. November 2, 1918. Two page article illustrated with five large photos, details the work of the Lighthouse Service in marking underwater shoals, with special emphasis on the use and types of buoys, work of tenders, and more. Photo illustrations show a few of the various phases of buoy work by the Lighthouse tenders. Includes full cover photo of men on the lighthouse tender repairing an ice-damaged lighted buoy. Interesting work on this little touched on subject. Full issue, clean, crisp. (VG). $48.