Its sides cannot yield; it coheres spontaneously, and not by the closeness of its rivets; and its perfect union of the materials enables it to defy the roughest seas.
"These two hulls are composed of steel plates, whose density is from .7 to .8 that of water.

The first is not less than two inches and a half thick and weighs 394 tons.

The second envelope, the keel, twenty inches high and ten thick, weighs only sixty-two tons.

The engine, the ballast, the several accessories and apparatus appendages, the partitions and bulkheads, weigh 961.62 tons.

Do you follow all this ?" "I do." "Then, when the Nautilus is afloat under these circumstances, one-tenth is out of the water.