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Scientific American 1903-08-22

ScientificAmerican1903-08-22.jpg Scientific American 1882-06-24ThumbnailsScientific American 1926-09Scientific American 1882-06-24ThumbnailsScientific American 1926-09Scientific American 1882-06-24ThumbnailsScientific American 1926-09Scientific American 1882-06-24ThumbnailsScientific American 1926-09Scientific American 1882-06-24ThumbnailsScientific American 1926-09

A great searchlight of 316 million candlepower, fitted with iris shutter. Diameter 6 feet 6 inches. Lighthouse at Heligoland, made by Siemens Schuckertwerke of Nuremberg, Germany.



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner