UNCLASSIFIED ACKNOW LEDGMENTS Appreciation is expressed to Mr. W. Williamson, Dr. L. Werner and Mr. B. Chow of this laboratory, Mr. S. Rainey and CDR T.E. Sheaof the Bureau of Ships, Washington, D.C., and Mr. S. Majeski of the New York Naval Shipyard, Brooklyn, for their assistance in certain field phases of this project. The contribution by Mr. J.Quanand Mr. J. O'Connor of this laboratory's Analytical and Standards Branch is noteworthy. The assistance by Mr. D. Puppione and Mr. V.DaGragnano, also of this laboratory, in data analysis is appreciated, The editorial advice given by Mr. J. Todd has been invaluable in the preparation of this report. UNCLASSIFIED