|These first attempts were | | on the Seine. | | generally failures. | | | | July 3, | " | Experiments with his | Brest, |These experiments were successful 1801. | | submarine boat named the | France. | in so far as proving that with | | _Nautilus_. | | such a boat he could descend to | | | | any given depth and reascend to | | | | the surface at will, and that he | | | | could remain below for a | | | | considerable time. | | | | August | " | Attempted to sink a small | " |Completely successful. This is 1801. | | vessel by means of one of| | the first vessel known to be | | his torpedoes. | | destroyed by means of a torpedo. | | | | Charge of submarine mine 20 lbs. | | | | gunpowder. | | | | 1801. | " | Attempted to destroy one | Off |Owing to the ship altering her | | of the English channel | Boulogne, | position at the moment of | | fleet by means of his | France. | setting the torpedo adrift, this | | drifting torpedoes. | | attack failed. | | | | Oct. 3, | " |Catamarran expedition under| Boulogne, |Failed, owing to a mistake in the 1804. | | Lord Keith to destroy the| France. | construction of the torpedoes. | | French fleet. | | The mines exploded, but did no | | | | damage to the French ships. | | | | Oct. | " | Similar expedition. | " |Similar failure, owing to causes 1805. | | | | above mentioned. | | | | Oct. 15, | " |Attempted to destroy a brig| Dover, |The brig was completely 1805. | | _Dorothea_ with his | England. | demolished. Two torpedoes | | drifting torpedoes. | | employed, each charged with 180 | | | | lbs.