Technical memorandum ; no. 6. Berkeley, Calif. : U.S. Tidal Model Laboratory. Appendix I. Program of beach erosion investigations -- Appendix II. Abstracts from 1903 report of Major Langfitt, annual reports of the War Department -- Appendix III. Summary of current survey 1932-1933 -- Appendix IV. Experiment 1: Petrographic analysis, abstracts from report of Dr. E.T. Hodge, geologist -- Appendix V. Miscellaneous data and observations.