ScientificAmerican1903-08-22.jpg Scientific American 1903-08-15ThumbnailsScientific American 1903-08-29Scientific American 1903-08-15ThumbnailsScientific American 1903-08-29Scientific American 1903-08-15ThumbnailsScientific American 1903-08-29Scientific American 1903-08-15ThumbnailsScientific American 1903-08-29Scientific American 1903-08-15ThumbnailsScientific American 1903-08-29

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