RECOMMISSIONING THE CARNEGIE 



The summer of 1927 was a happy one for the Carnegie. She 

 must have been restless indeed in her berth on the Potomac 

 River, where for six years she had watched the seasons come and 

 go without the tramping of sailors on her deck, or the tang of 



The Oscillator of the Sonic Depth-finder 



Installed in the keel — the vibration of this heavy diaphragm sends to the bottom the 

 sound-wave whose echo is picked up by the microphones. 



salt spray on her bow. And now she was to be recommissioned 

 for the grandest cruise of all, over the oceans she knew so well. 

 Tugs of the United States Coast Guard took her safely to dry- 

 dock in New York, and brought her back to Washington in the 

 fall. Captain Ault and Mr. Erickson, her mate, supervised the 

 installation of new masts and rigging. Only the old royal-yard 



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