SUBMARINE MINE EXPLOSIONS.
At [Fig. 165] is shown a sketch of two submarine mine explosions from an instantaneous photograph; the schooner which is shown in the sketch happened to be passing at the moment of explosion, thus affording a comparison as to the size of the columns of water thrown up.
The column on the left was due to the explosion of a submarine mine containing 100 lbs. gunpowder at a depth of 10 feet below the surface. That on the right was the result of an explosion of a similar mine, but at a depth of 41 feet below the surface. Its extreme height was 400 feet.
CHAPTER IX.
TORPEDO EXPERIMENTS.
THE following are some of the more important torpedo experiments that have been carried out in England and Europe, to investigate the subject of submarine explosions as applied to ships and to mines, &c., these experiments extending over a space of thirteen years.