“You begin to see the possibility—I should say the success—of this attempt. That which is impossible for an ordinary vessel is easy to the Nautilus. If a continent lies before the pole, it must stop before the continent; but if, on the contrary, the pole is washed by open sea, it will go even to the pole.” “Certainly,” said I, carried away by the Captain’s reasoning; “if the surface of the sea is solidified by the ice, the lower depths are free by the Providential law which has placed the maximum of density of the waters of the ocean one degree higher than freezing-point; and, if I am not mistaken, the portion of this iceberg which is above the water is as one to four to that which is below.” “Very nearly, sir; for one foot of iceberg above the sea there are three below it. If these ice mountains are not more than 300 feet above the surface, they are not more than 900 beneath. And what are 900 feet to the Nautilus?” “Nothing, sir.” “It could even seek at greater depths that uniform temperature of sea-water, and there brave with impunity the thirty or forty degrees of surface cold.” “Just so, sir—just so,” I replied, getting animated. “The only difficulty,” continued Captain Nemo, “is that of remaining several days without renewing our provision of air.” “Is that all? The Nautilus has vast reservoirs; we can fill them, and they will supply us with all the oxygen we want.”