These few incidents, strung together at random, and embracing only limited experiences out of many in one enterprise, are illustrative, in their variety and character, of this hardy pursuit, and the fascination of danger which is the school of native hardihood. But they give the reader a very imperfect idea of the nature and appearance of the new element into which man has pushed his industry. The havoc and spoil, the continued danger and contention, darken the gloom of the submarine world as a flash of lightning leaves blacker the shadow of the night and storm. The first invention to promote subaqueous search was the diving-bell, a clumsy vessel which isolates the diver. It is embarrassing, if not dangerous, where there is a strong current or if it rests upon a slant deck. It limits the vision, and in one instance it is supposed the wretched diver was taken from the bell by a shark. It permits an assistant, however, and a bold diver will plunge from the deck above and ascend in the vessel, to the invariable surprise of his companion. An example of one of its perils, settling in the mud, occurred, I think, in the port of New York. A party of amateurs, supported by champagne flasks and a reporter, went down. The bell settled and stuck like a boy's sucker. One of the party proposed shaking or rocking the bell, and doing so, the water was forced under and the bell lifted from the ooze. But a descent in submarine armor is the true way to visit the world under water. The first sensation in descending is the sudden bursting roar of furious, Niagarac cascades in the ears. It thunders and booms upon the startled nerve with the rush and storm of an avalanche. The sense quivers with it. But it is not air shaken by reflected blows: it is the cascades driven into the enclosing helmet by the force-pump. As the flexile hose has to be stiffly distended to bear an aqueous gravity of twenty-five to fifty pounds to the square inch, the force of the current can be estimated. The tympanum of the ear yields to the fierce external pressure. The brain feels and multiplies the intolerable tension as if the interior was clamped in a vice, and that tumultuous, thunderous torrent pours on. Involuntarily the mouth opens: the air rushes in the Eustachian tube, and with sudden velocity strikes the intruded tension of the drum, which snaps back to its normal state with a sharp, pistol-like crack. The strain is momently relieved to be renewed again, and again relieved by the same attending salutes.