Therefore I can sink to a considerable depth.

When I wish to rise to the level of the sea, I only let off the water, and empty all the reservoirs if I want the Nautilus to emerge from the tenth part of her total capacity." I had nothing to object to these reasonings.
"I admit your calculations, Captain," I replied; "I should be wrong to dispute them since daily experience confirms them; but I foresee a real difficulty in the way." "What, sir ?" "When you are about 1,000 feet deep, the walls of the Nautilus bear a pressure of 100 atmospheres.

If, then, just now you were to empty the supplementary reservoirs, to lighten the vessel, and to go up to the surface, the pumps must overcome the pressure of 100 atmospheres, which is 1,500 lbs.

per square inch.

From that a power----" "That electricity alone can give," said the Captain, hastily.