Bond, A. Russell (Alexander Russell), 1876- · New York, The Century co. · leaf 341
feetor more from the stem of the ship. The soundswere then brought in by an electric cable to thelistener in the ship. These sound-detectors were placed on Alliedsubmarines as well as surface vessels and theywere actually tried out on balloons and dirigfi-bles, so that they could follow a U-boat… … o •Listening • •D*pthet>or^^—jiase PetitofC/imtfH ,^Caurs* erSubmarina Courtesy of the Scientific American Fie. 21. Chart of an actual pursuit of a U-boat whichended in the destruction of the submarine 21 illustrates a very dramatic chase. The fullline shows the course of the U-boat as…
Inventions
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