2nd Experiment.
Torpedo:—585 lbs. of dynamite. It was placed 60' horizontally from the keel, 48' actual distance from the side, and opposite amidships; 36' below the surface of the water, and 42' from the ground.
Pontoon:—Draught of water 19·5', and moored in 74' of water.
Effect of explosion:—The pontoon, which had been more rigidly moored than in the previous experiment, was moved bodily away a distance of 4 feet. Many rivets were loosened, and a few connecting the angle irons were sheared; also the outer skin was slightly indented. No damage was done to the condenser or Kingston valves.
Experiment in the Sea of Marmora, 1875.—This experiment was carried out by Turkish officers attached to their naval school at Halki, an island in the Sea of Marmora, about eight miles from Stamboul. It consisted in destroying a Turkish schooner by the explosion of an 100-lb. gun-cotton mine in contact with her, moored in 58 feet of water, and 10 feet beneath the surface.
Experiment at Carlscrona, Sweden, 1876.—This experiment was a continuation of those previously carried out in 1874-75, and which have been detailed at [page 224], &c.
Target:—The same as had been used for the previous experiments (1874-75), and which had been thoroughly repaired.