BEACH EROSION LITERATURE 



The^-e are listed below some recent acquisitions to the Board's 

 library which are considered to be of general interest. Copies of 

 these publications can be obtained on 30-day loan by interested official 

 agencies. 



"An Instrument for Recording Continuously the Salinity, Ten^rature, 

 and Depth of Sea Water," A. W» Jacobson, AIEE Transactions ^ 1943o 



This paper desciribes a practical salinity and temperature 

 recording instruments This instrument has been operated success- 

 fully in recording hydrographic data. It has been applied 

 particularly for inshore s\irveys in shoal water and in ocean 

 areas where its accuracy of 0.2 degrees Fahrenheit and 0.3°/00 

 is adequate. Its time constant of one-half second permits con- 

 tinuous records of temperature and salinity to be made from a 

 moving vessel, or while measuring elements are being lowered 

 vertically. 



"Tourmaline Pressure Gauges," Clifford Frondel, American fiir^ralogist, 

 Vol, 33, Jan-Feb» 194.8 « 



This paper describes in detail the design and construction 

 of the gauges. The gauges comprise thin-discs of tourmaline 

 from 7^-inch up to several inches in diameter cut perpendicular 

 to the c axis and used in singly or in stacks. The piezoelectric 

 response of the tourmaline is amplified and recorded on associated 

 electronic equipment and both the magnitude of the peak pressure 

 and the wave form deduced thereby. The supply, price and factors 

 determining the usability of raw toiirmaline for the purpose is 

 also discussed. 



"International Hydrographic Review," Vol, XXVI, No. 2, November 194-9 o 



This publication presents status of several radio, navigation^ 

 and positioning systems as developed in the United States and 

 foreign countries, 



"An Instrument for Recording Ultra Low Frequency Ocean Waves,'* W, H. 

 Mmk, October 1943, 



This article discusses an instrument designed to measure 

 low amplitude waves whose frequencies fall between those of the 

 wind-generated ocean swell and those of the astronomic tides. 



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