If slanted, the Nautilus, according to this inclination, and under the influence of the screw, either sinks diagonally or rises diagonally as it suits me.

And even if I wish to rise more quickly to the surface, I ship the screw, and the pressure of the water causes the Nautilus to rise vertically like a balloon filled with hydrogen." "Bravo, Captain! But how can the steersman follow the route in the middle of the waters ?" "The steersman is placed in a glazed box, that is raised about the hull of the Nautilus, and furnished with lenses." "Are these lenses capable of resisting such pressure ?" "Perfectly.

Glass, which breaks at a blow, is, nevertheless, capable of offering considerable resistance.

During some experiments of fishing by electric light in 1864 in the Northern Seas, we saw plates less than a third of an inch thick resist a pressure of sixteen atmospheres.

Now, the glass that I use is not less than thirty times thicker." "Granted.