Sounding. Into Manhattan steamed the French liner Paris, bearing storm scars, notables, a squad of German engineers and a new German device for deep-sea sounding with which the engineers had experimented on the way over from Havre. This device consisted of a gun on the port side, a microphone abreast on the keel's starboard side, a dial on the bridge. The gun fired a cartridge overside, which exploded a fathom under water. The microphone registered this explosion's last echo from the bottom, permitting the depth...
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