Rate of Fall of Still -water Level 



The instantaneous rate of fall of the tide, in hundredths of feet 

 per hoiir, as determined from observed times and magnitudes of high and 

 low water. Values used ranged from 0.00 to O.60 feet per hour, and were 

 computed for the mid-points of the 6 lag periods. 



P 



Water Density 



The "sigmatee" values for the sea water as determined (U. S. Navy 

 Hydro. Office, I962) from temperature (+ 0.05°C) and salinity (+ 0.02 °/oo) 

 data once daily at noon time in the surf zone, for the summer measurements, 

 and three times daily in the shoaling-wave zone, for the winter measure- 

 ments. Values used ranged from I.OI36 to I.O25OO gm/cm-^. 



63 



