Washington, June 6.
High U. naval sources indicated relay thai the United States has perfected a method of attacking enemy warships which was believed io be superior to assaults with aerial torpedoes, Details of the method were kept secret, but it wes believed that one of the features was dive-bombing—a technique the United States originally developed and which Germany adopted so successfully, Officials did not attempt to minimize Great Britain's use of torpedo-carrying planes against the Bismarck, crack German battleship which was recently sunk by the Royal Navy, but indicated that the United States has developed more effective methods,
Text read from the printed page and cleaned; old type leaves the occasional error.