VI . Massachusetts Insti t ute of Technology, Contract No. DA-li9-055 - 

 eng-] 6, Progress Report dated 15 December 1953. 



The wave generator is completed, has been tested over its entire range 

 and has been found satisfactory in all respects. 



Observations of the location of the breaking point of the waves on 

 the 1:15 beach have shown a shifting of the breaking points due to secondary 

 wave reflections in the channel, over a sizable distance. 



A wave filter of expanded aluminum has been constructed and installed 

 to prevent the condition outlined above . It has been tried and found 

 to perform satisfactorily. 



A wave profile recorder based on the variable capacitance type has been 

 developed and constructed for this as well as another rela-beu project. This 

 recorder has been tested and performs very well, however, delay in the 

 delivery of the recording equipment has prevented the start of the test 

 program proper. 



VII . "waterways Experiment Station, Vicksburg, Mississippi, Progress 

 Reoort for Period ending 30 November 1953 . 



V.ave Run-up on Shore Structures - Overtopping and run-up tests on a 

 smooth faced pavement with a sea side slope of 1 on 1§ and a beach slope 

 of 1 on 10 were completed. Similar tests on a step-faced seawall with sea- 

 side slope of 1 on 1-g- were initiated. 



Effects of Inlets on Adjacent Beaches - Test was continued through 

 tidal cycle U50, and the results are now being studied to determine whether 

 the test has been carried to its practical end, or whether additional 

 operation would result in added information. 



VIII . Beach Erosion Board, Research Division, Project Status Report 

 for Quarter ending 15 December 1953 * 



In addition to the research projects under contract to various institutions 

 which are reported on above, the Research Division of the Beach Erosion Board 

 is carrying out certain projects with its own facilities. The main un- 

 classified projects have been described in previous numbers of the Bulletin, 

 and a short description of some of the work accomplished through the last 

 quarter is given below. 



Statistical ;vave Data for the North Atlantic Coast - Tabulation of 

 three years of data for four stations along the North Atlantic coast of 

 the U. S. has been completed, and a report s imilar to those issued for the 

 Great Lai es is, scheduled to be published early in 195h. A comparison of 



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