CONTENTS

PAGE
“A Word to You”[vii]
CHAPTER
I.The First of the Submarines[1]

How the Submarine Came to Be.—The Development ofthe Submarine.—The First Submarine Boat.—A Submarineof the Revolution.—The First Torpedo Fired by a Submarine.—RobertFulton’s Submarine.—The Earliest SteamPropelled Submarine.—The Coming of the Torpedo-TubeSubmarine.—The Invention of the Electric Submarine.—Whatthe Gas Engine Did for the Submarine.—The TwoTypes of Submarines.

II.How to Make and Work a Model Submarine[23]

The Ballast Tank.—The Air Control Mechanism.—Aboutthe Power Plant.—The Pusher Control Device.—The Propeller-Shaft.—Installingthe Motor.—Ballasting the Boat.—Makingthe Superstructure.—And Now the Conning Tower.—Settingthe Propeller.—Putting on the Rudder.—PaintingYour Craft.—How to Work Your Submarine.

III.How a Real Submarine Is Made and Works[51]

The Parts of a Submarine.—How the Hull Is Made.—Whatthe Superstructure Is.—The Outside of the ConningTower.—A Look Inside of the Hull.—A Peep into theConning Tower.—Now the Navigating Compartment.—Next,the Diving Control Compartment.—The Four Statesof the Submarine.—How a Submarine Dives.—The BallastPumps and What They Do.—What the Buoyancy TanksAre For.—Compressed Air and Air-Compressor Pumps.—Insidethe Torpedo Compartment.—Why Trimming TanksAre Used.—In the Mine Compartment.—And Last of All,the Sea Anchor.—Where the Crew of a Submarine Lives.

IV.The Heart of the Submarine[73]

What a Good Power Plant Is.—The Faults of the SteamEngine.—When the Gasoline Engine Came.—How theGasoline Engine Works.—The Last Word in SubmarineEngines.—Why an Electric Power Plant Is Needed.—TheDynamo-Motor and Storage Battery System.

V.Making and Shooting the Torpedo[91]

The First Submarine Torpedoes.—How to Make a ModelSubmarine Torpedo.—The Body of the Torpedo.—YourTorpedo in Action.—How a Real Torpedo Is Made.—TheDetonating, or Firing Mechanism.—The Engine that Drivesthe Torpedo.—How a Torpedo Is Shot at a Ship.—A Torpedowith a Cannon in It.

VI.Making the Submarine Deadlier[115]

Arming the Submarine with Guns.—The Need of a Quick-ActionGun.—The Spring Action Gun.—The CompressedAir Action Gun.—How a Submarine Lays Mines.—Kindsof Submarine Mines.—How the Mines Are Made.

VII.The Wonderful Eye of the Submarine[129]

How the Eye of the Submarine Got Its Name.—The FirstSubmarine Eye, or Periscope.—How to Make a SimplePeriscope.—The Modern Lenticular Periscope.—How theTelescope Is Made.—The Latest Type of Periscope.—TheLimited Use of the Periscope.—The New Enemy of theSubmarine.

VIII.The Marvelous Tongue and Ears of the Submarine[143]

The Tongue and Ears of a Submarine.—Kinds of SignalingSystems.—The Wigwag Way of Signaling.—The FlashlightSystem.—The Wireless Telegraph System.—UnderwaterSignaling Systems.—The Electric Current, or ConductivitySystem.

IX.The Crew of the Submarine[159]

Conditions on Early Submarine Craft.—When Crews WereHard to Sign.—What the Base-Ship Is For.—How MenAre Trained for Submarine Duty.—The Complement ofa Submarine.—Breaking in Raw Recruits.—The Conditionsin War Time.

X.How the Submarine Attacks[171]

The Uses of the Submarine.—The Submarine as a Scout.—TheSubmarine as a Blockader.—How a Submarine Attacksa Merchantman.—When Submarines Attack in Pairs.

XI.The New Submarine Chasers[185]

Schemes for Outwitting the Submarine.—Plans for Destroyingthe U-Boats.—Kinds of Submarine Chasers.—Howthe Chaser Chases a Submarine.—Shooting the Gunsof the Chaser.—Submarine Air Chasers.—A Way to Liftthe U-Boat Blockade.

XII.The Last Word in Submarines[199]

Uncle Sam’s Latest Submarines.—The Great Blockades ofthe Warring Nations.—The First of the Merchant Submarines.—SomeFacts About the Deutschland.—How theUnited States Can Break the Blockade.—When Submarine