"It is not probable, Conseil."
"Well, but allow me to finish, please, sir; if this phenomenon should take place, it will be troublesome for M. Lesseps, who has taken so much pains to pierce the isthmus."
"I agree with you; but I repeat, Conseil, this phenomenon will never happen. The violence of subterranean force is ever diminishing. Volcanoes, so plentiful in the first days of the world, are being extinguished by degrees; the internal heat is weakened; the temperature of the lower strata of the globe is lowered by a perceptible quantity every century to the detriment of our globe, for its heat is its life."
"But the sun?"
"The sun is not sufficient, Conseil. Can it give heat to a dead body?"
"Not that I know of."
"Well, my friend, this earth will one day be that cold corpse; it will become uninhabitable and uninhabited like the moon, which has long since lost all its vital heat."
"In how many centuries?"
"In some hundreds of thousands of years, my boy."
"Then," said Conseil, "we shall have time to finish our journey, that is, if Ned Land does not interfere with it."
And Conseil, reassured, returned to the study of the bank, which we were skirting at a moderate speed.
There, beneath the rocky and volcanic bottom, lay outspread a living flora of sponges and reddish cydippes, which emitted a slight phosphorescent light, commonly known by the name of sea-cucumbers; and walking comatulæ more than a yard long, the purple of which completely colored the water around.
The Nautilus having now passed the high bank in the Lybian Straits returned to the deep waters and its accustomed speed. From that time no more mollusks, no more articulates, no more zoöphytes; barely a few large fish passing like shadows. During the night of the 16th of February, we entered the second Mediterranean basin, the greatest depth of which is 1,450 fathoms. The Nautilus, by the action of its screw, slid down the inclined planes, and buried itself in the lowest depths of the sea.
On the 18th of February, about three o'clock in the morn-
