INDEX 73 



Page 



Solar diurnal current 22,45, 46 



Stationary wave — - — 5 



Stone Horse Shoal Lightship --- 23, 26, 27, 32, 43, 48 



Strength of current 2 



ebb 2 



flood 2 



variations in . 3, 4, 12 



Tabular current data. See List of tables, page iv. 



Tabular current data, explanation of 1 20-24 



Tail of the Horseshoe Lightship 26, 28, 34, 44, 52 



Tidal current, definitions 1 



general characteristics 1-15 



periodic variation in 3, 4, 12 



rectilinear 1 



reversing l~9i 27-29 



. rotary__ 9-14, 26, 30-35 



time of in relation to time of tide 5-7 



types of 4-12 



Tidal cycle, distance traveled in 7, 8 



Tide, Greenwich high and low water intervals 36 



high and low water used as time reference for currents 6, 18 



predictions 22, 26 



stations 21, 36 



Time relation, current to Greenwich transit 18, 21, 26, 27-35 



current to tide 5, 18, 26 



tide to Greenwich transit 18, 36 



Types of tidal currents 4, 12 



Velocity of current and progression of tide 8, 9 



Vineyard Sound Lightship 26, 30, 33, 41, 49 



Wind current 23, 24, 26, 55-70 



reduction of 19, 20 



Winter-Quarter Shoal Lightship 21, 26, 34, 37, 46, 52, 63, 68-70 



o 



