The Deadly Torpedo The Eye of the Submarine Giant Guns Guns that Fire One Thousand Shots per Minute How Guns were Invented How Guns were made to Shoot Straight How Shells were Invented How Torpedoes and Mines are Exploded How We Came to Make Iron Ships Measuring the Distance to the Enemy Ships that Go Under the Sea Ships that Go Up in the Air Some Questions about Submarines A Very Dangerous Occupation War in the Air What is an Explosive?
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