something like impunity, torpedo warfare will then take another form, that of torpedo vessels against torpedo vessels, whose tactics will, in due time, be a subject for another study. FREDERICK HARVEY, _Commander R.N._ THE SUBJOINED IS A REMARK UPON THE DESCRIPTION OF VESSEL ADAPTED TO THE SERVICE OF THE SEA TORPEDO. Vessels adapted to the service of the sea torpedo should be about 400 tons burthen; her extreme length, over all, from taffrail to figure-head, about 150 feet. The form of body to be such as to attain the greatest practicable speed. Speed being the essential condition of a torpedo vessel, a perfectly flush upper or weather deck, without any bulwarks, is advisable; instead of bulwarks, life-lines, supported by stanchions, supply their place to prevent accidents of falling overboard. Thus fitted, there would be nothing to hold wind that could retard speed, as there is in vessels of ordinary build. So covered in, the vessel would not, under any condition of weather, ship water; she would not, from such cause, be in any danger of foundering. The height of the weather-deck above the water-line at midships, 9 feet; the height of the main deck above the water-line, 18 inches; leaving a clear height between decks of 6 feet 6 inches. There should be two water-tight bulkheads, one about 50 feet from the stem, and the other about 20 feet from the stern-post; the two water-tight bulkheads come up to the under side of the main deck, with which the bulkhead form perfectly water-tight compartments. In the fore compartment, empty water-tight cases would occupy the lower part, over which would be stowed the cork buoys and some light resisting material, rendered uninflammable, so that in the event of the fore body being ripped open below the water-line, there would be no space for the admission of water; the trim of the vessel would therefore be preserved. The after compartment would be similarly stowed. There would be a capacious engine-room to allow of powerful engines to work twin screws; there would also be capacious coal-bunkers and a coal-hold before the engine-room; and before the coal-hold a small hold for the stowage of cables and various articles. There would also be a pilot-house, in which would be protected the officer in command, who would be so placed as to have his orders immediately obeyed. The torpedo-room, to contain about one hundred torpedoes of various destructive powers, the weight of which may be about 10 tons, would be in the after body, and as low down as may be convenient. Upon the orlop deck, which covers the magazine, would be the towing gear, and machinery for working such gear. On the orlop deck would also be a steering wheel, by which the vessel would be steered when in action. The space between the decks of the entire length of the vessel