echanical law of similitude test, while going at full speed on the surface, she additional submarines, known as the “Adder,” “Gram- connecting the operation of any kind of model with pus,” “Moccasin,” ‘Pike,’ ‘Porpoise,” “Shark,” and shifted her motive power from gasoline engines to the… … Elizabethport, N. J. The “Holland,” which was pur- a depth of 20 feet in 4 minutes and 20 seconds. In screw propellers, and others. It is necessary, how- the test of the automatic devices for blowing the ballast chased for purposes of experimentation and practice, ever, that certain conditions be…
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