Germany's U-9 and Some of Her Sister Submarines.--Aeroplane and Submarine 234 Russian Cruiser-Lake Type Submarine in Shed Built by Peter the Great--1905 236 A Group of German U-boats 238 Russian-Lake Type Cruising Submarine "Kaiman" making a Surface Run in Rough Weather in the Gulf of Finland 239 The U-65 242 Russian-Lake Type 243 C-1, One of the Later Type French Submarines 248 Cargo-Carrying Submarines of the Author's Design 249 The "Deutschland" 252 Torpedo being Fired from the Deck Tubes of the Submarine "Seal" 256 British Submarine No. 3 Passing Nelson's Old Flagship "Victory" 257 Under-ice Navigation 260 A Submarine Garden at the Bottom of the Sea 266 Submarines for Hydrographic Work and Wreck Finding 267 The "Argonaut" Submerged 276 Experimental Cargo-Recovering Submarine 278 Sketch Drawing Illustrating a Method of Transferring Cargoes from Sunken Vessels to Submerged Freight Cargo-Carrying Submarines 278 Semi-submergible Wrecking Apparatus 280 Submarine Oyster-Gathering Vessel 286 The "Argosy and Argonaut III" 290 Diagram of the "Argosy and Argonaut III" 291 LINE CUTS Method of Control in Diving Type Boats 17 Method of Controlling Hydroplane Boats 18 How Hydroplanes Control Depth of Submersion 19 Showing Various Conditions in Which a Submarine of the Level Keel Type Fitted with Bottom Wheels, May Navigate 21 The Periscope is the Eye of the Submarine 23 Diving Compartment 31 Bushnell's Submarine, the "American Turtle" 79 Robert Fulton's Submarine 82 Tuck's "Peacemaker" 84 Longitudinal Section of the French Submarine "Le Plongeur" 153 The "Plunger" (Holland Type Submarine), Launched in August, 1897 167 Lake Design as Submitted to the U. S. Navy Department in 1893 170 The "Argonaut" after Lengthening and Addition of Buoyant, Ship-shaped Superstructure, Increasing the Surface Buoyancy over 40 Per Cent 178