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Scientific American, Vol. 79, No. 14 (October 1898) (1898)

leaf 8

An illustration from Scientific American, Vol. 79, No. 14 (October 1898), 1898, leaf 8
the month of the harbor. on the buoy being Our battleships and armored cruisers could easily struck by a passing ves- have forced the entrance if the nondescript batteries sel, swings into contact with a metallic ring and that guarded it had been the sole means of defense. It was known, however,… … Fig. 1.—EXPLOSION OF A GROUP OF THREE GROUND MINES IN Fig. 2.—EXPLOSION 07 A DOUBLE MINE IN BALTIMORE HARBOR. BALTIMORE HARBOR. Charge of 225 to 250 pounds dynamite. Water 81 5 Feet deep. Column of watei 200 feet wide and 225 feet high. Base of water column, luO feet wide; height, 246 feet © 1898…

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