Notwithstanding these disadvantages, he engaged in a course of experiments which required no less courage than perseverance. From a report of his proceedings to the committee appointed by the French Government we learn that in July, 1801, he embarked with three companions on board of this boat, in the harbor of Brest, and descended to the depth of twenty-five feet, remaining below the surface an hour, in utter darkness, as the candles were found to consume too much of the vital air. He placed two men at the engine, which was intended to give her motion, and one at the helm, while he, with a barometer before him, kept her balanced between the upper and lower waters. He could turn her round while under the water, and found that in seven minutes he had gone about a third of a mile. During that summer Fulton descended under water with a store of air compressed into a copper globe, whereby he was enabled to remain under water four hours and twenty minutes. The success of these experiments determined him to try the effect of his invention on the English war-ships, then daily near the harbor of Brest--France and England being then at war. He made his own bombs. For experimental purposes a small vessel was anchored in the harbor, and with a bomb containing about twenty pounds of powder, he approached within about two hundred yards, struck the vessel, and blew her into atoms. A column of water and fragments were sent nearly one hundred feet into the air. This experiment was made in the presence of the prefect of the department and a multitude of spectators. During the summer of 1801 Fulton tried to use his bombs against some of the English vessels, but was not successful in getting within range. The French Government refused to give him further encouragement. The English had some information concerning the attempts that their enemies were making, and the anxiety expressed induced the British Minister to communicate with Fulton and try to secure to England his services. In this he was successful, and Fulton went to London, where he arrived in 1804, and met Pitt and Lord Melville. When Mr. Pitt first saw a drawing of a torpedo with a sketch of the mode of applying it, and understood what would be the effect of the explosion, he said that if it were introduced into practice it could not fail to annihilate all navies. [Illustration: Fulton Blowing Up a Danish Brig.]