II-A "Wave Refraction Plotter" by R. Q. Palmer, Honolulu Area, 

 F U. S. Army Engineer District San Francisco 



A plotter devised for constructing wave refraction diagrams 

 is depicted and procedures for its use explained. The 

 plotter is attached to a standard drafting machine. More 

 than twice the production, with fewer errors, is claimed 

 through use of the plotter when compared with use of the 

 standard template or protractor, 



II-A "Status of Research in Shore Line Protection" by Joseph M. 



C Caildwell, Beach Erosion Board 



E 



An unpublished paper delivered before the American Society 

 of Civil Engineers in August 1955. A rather complete 

 summary regarding the status of investigation and knowledge 

 in the field of coastal engineering is presented under three 

 general headings of Wave Action, Shore Processes and 

 Improvement Works. A bibliography of 41 references is also 

 included which present the details of the material summarized, 



II-D "Tests of River Crest Stage Gage Under Wave Action" by Thorndike 

 Saville, Jr., Beach Erosion Board 



A river crest stage gage is investigated to determine feasi- 

 bility of its use to measure maximum water elevations in 

 estuaries »ind adjacent low-lying areas resulting frcmi hurri- 

 cane surges. It was found that the gage could be modified 

 to permit its use for this purpose with a maximum error of 

 only a few tenths of a foot even under conditions of rela- 

 tively high wave action. 



"Progress Reports on Research Sponsored by the Beach Erosion 

 Board" 



Summaries of progress made during the previous year on the 

 several research contracts in force between universities 

 or other institutions and the Beach Erosion Board, together 

 with brief statements regarding the status of scane research 

 projects being prosecuted in the Board's laboratory, are 

 presented. A list of all Technical Memoranda (Nos, 1-97) 

 published by the Beach Erosion Board through June 1957 is 

 included. 



"Beach Erosion Studies" 



Summaries of completed cooperative study reports on Saco 

 Maine, Chatham Massachusetts, State of Connecticut - 



76 



