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Scientific American 1918-06-22

ScientificAmerican1918-06-22.jpg Scientific American 1915-06-19ThumbnailsTechnical World 1912-08Scientific American 1915-06-19ThumbnailsTechnical World 1912-08Scientific American 1915-06-19ThumbnailsTechnical World 1912-08Scientific American 1915-06-19ThumbnailsTechnical World 1912-08Scientific American 1915-06-19ThumbnailsTechnical World 1912-08

Infantryman having his face blackened before starting on a night raid.