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Testing the new type of h S ydrophone on the de miles out at sea. Left to right: Prof. Max sion; Prof. G, N. Pierce, Harvard university, and Prof. H. C. Hayes Stroyer Breckinridge, 35 Mason, submarine commis- Kasuga, Jap Wars hip, drops in for friendly call in the Hud- son An _interest- ing glimpse of the har- bor at Kiel, Germany The United States torpedo boat destroyer Bainbridge, like the Lawrence, shown on he opposite page, was launched recently at the yards of the New York Shipbuilding Corp., Camden. Miss Juliet Edith Greene was sponsor for the Bainbridge 507 The electrically pro- pelled battleship Tennes- see is capable of making 21 knots. Her main en- gines consist of two Westinghouse turbine generators rated at 15,000 kilovolt amperes each