NO. 8 - July 1945 



II-D "Depths of Offshore Bars" (Dr. G. H. Keulegan) 



A method for predicting depths over crests and in 

 troughs of offshore bars is outlined. Information 

 on the position and size of bars gathered from exist- 

 ing literature and laboratory tests is briefly dis- 

 cussed and summarized. 



NO. 9 - July 1948 



Il-ir "Proof Test of Water Transparency Method of Depth Deter- 

 mination" by J. V. Hall, Jr. 



A report on field tests made to determine practicability 

 of a method developed by the British Army during World 

 War II to determine water depths from aerial photographs. 

 Conclusions reached indicate the method to be unsuitable 

 for either military or civil application due to extreme 

 difficulties encountered in obtaining suitable photo- 

 graphy and controlling results through strict laboratory 

 procedure. Strict criteria for meteorological and 

 oceanographic conditions are necessary to obtain usable 

 photographs. 



NO. 10 - 1948 



II-E "Experimental Steel Pile Groins Palm Beach, Florida" 



Five experimental steel sheet pile groins were con- 

 structed on the Atlantic Coast at Palm Beach, Florida. 

 Steel was donated by 5 steel companies, designs made by 

 the Beach Erosion Board, and construction by the City 

 of Palm Beach. Observations regarding deterioration of 

 steel and protective coatings over a period of 10 years 

 are reported and conclusions drawn regarding the manner 

 of deterioration. 



NO. 11 - November 1949 



I-A "Reflection of Solitary Waves" by Joseph M. Caldwell 



A laboratory study to determine and evaluate the effect 

 of the several variables controlling the amount of wave 

 energy reflected by representative beach or shoreline 

 structures. Solitary waves were run against four simu- 



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