Red and White Meat. FORMS OF PERISCOPES FOR SUBMARINES. THE EYE THAT LOOKS IN ALL DIRECTIONS AT ONCE. The universal observation lens. The periscope top., scientific american, -1909-10-23
Red and White Meat. FORMS OF PERISCOPES FOR SUBMARINES. THE EYE THAT LOOKS IN ALL DIRECTIONS AT ONCE. The universal observation lens. The periscope top., scientific american, -1909-10-23
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