ScientificAmerican1915-06-12.jpg Scientific American 1915-05-15ThumbnailsScientific American 1915-05-15ThumbnailsScientific American 1915-05-15ThumbnailsScientific American 1915-05-15ThumbnailsScientific American 1915-05-15Thumbnails
Using the searchlight to repel a night attack.