. American engineer and railroad journal . ght anelectric lamp. The torpedo-boat thus announces its own ar- .rival on the .scene in spite of itself, and precautions can betaken against it. The hydrophone is at present undergoing a practical trialin the Solent, .and Captain MEvoy, the inventor, estimatesthat three of the instruments suitably placed would be suflScient to protect Portsmouth Ilarlior. He is now engaged inconstructing a larger bell than that already submerged, inorder to meet the requirements of the government whole apparatus is beautifully worked out, and compar-a
. American engineer and railroad journal . ght anelectric lamp. The torpedo-boat thus announces its own ar- .rival on the .scene in spite of itself, and precautions can betaken against it. The hydrophone is at present undergoing a practical trialin the Solent, .and Captain MEvoy, the inventor, estimatesthat three of the instruments suitably placed would be suflScient to protect Portsmouth Ilarlior. He is now engaged inconstructing a larger bell than that already submerged, inorder to meet the requirements of the government whole apparatus is beautifully worked out, and compar-atively inexpensive. Moreover, it is sufficiently sensitive toannounce the passage of steamers a mile distant from the such an instrument might also be used for signaling, for a ship, by slopping and starting lierpropeller, could send a message in the Morse Code, and theshore could respond by flashing the electric lamp. In the caseof another ship the response might be made by her propeller.— The Jjondon Timcs.\. OO oo l-I aO < 1^ X ao < E-D! a az
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
