ADMINISTRATIVE INFORMATION The work reported was done under Bureau of Ships Project Number NS-O81- 001 (Technical Objective AW-7),as part of Subtask 1, Problem 2. The Problem described as Problem 3, Program 1, in this Laboratory's Preliminary Presentation of USNRDL Technical Program for FY 1957, February 1956. The work was continued under Bureau of Ships ProjectNumber 088-001 (Technical Objective SR-2), Subtask 1, Problem 1, described in USNRDL Technical Program Proposed for Fiscal Year 1958, May 1957, as Problem 3, Program 2. ACKNOWLEDGEMENTS Appreciation is expressed to Messrs. P.D. LaRiviere and W.L. Galliher for their assistance to this study. iv