116 



INDEX 



Duration of rise of tide 11, 50, 57, 65, 67 



Duration of slack water 111 



Extreme liigh water 52,60 



Extreme low water 54,60 



Extreme range-. 13 



Glycerin gauge 5 



Greenwich intervals 11 



Half tide level. See Mean tide level. 

 Harmonic analysis: 



Currents.. 23, 25, 79, 81, 112 



Tides 14, 17, 64, 103 



High water 11, 50, 51, 57, 58 



Inequality. See Diurnal inequality. 

 Intervals. See Lunitidal intervals. 



Introduction 1 



Low water 11,50,51,58 



Lunitidal intervals 10, 17, 50, 56, 57, 65, 67, 98 



Mean current hour 19 



Mean rise interval 10 



Mean sea level 14,41,61,62,104 



Mean tide level 14, 56, 61, 62, 105 



Mean values 105, 112 



Moon Uead 27 



Narrows, The... 26 



Navy yard. See Boston Navy Yard. 



Navy yard datum... 42 



Neap range 12, 17, 100 



Neap tide level. 14, 17 



Nontidal current 110 



Parallax age 14 



Perigean range 12,17,100 



Pettersson current meter 22 



Phase age 14 



Porcelain tide staff. 6 



Price current meter 22 



Progression of the tide.. 110 



Publications relating to tides and currents... 113 



Pas* 

 Range of tide: 



Descriptive 12, 15, 17, 18, lOO 



Tables 51,59,63,65,67 



Rectilinear tidal current 107 



Relation of current to tide. lOd 



Rotary tidal currents 107 



Sea-level datum. 41 



Spring range 12, 17, 18, lOO 



Spring tide level 14, 17 



Summaries: 



Adjusted tidal data 67 



Condensed current data 89 



Ranges and inequalities 63 



Tide planes 6a 



Time relations.. 62 



Surface currents 25,82 



Tables. 4» 



Temperature and density of sea water 28, 90 



Tidal data: 



Adjusted data, Boston Harbor.. 18,67 



Boston Harbor, miscellaneous series 18,65 



Boston Navy Yard... 2, 50, 62 



Commonwealth Pier No. 5 14,56,62 



Tidal datums 41, 104 



Tide: 



Definitions 98 



General characteristics 98 



Mean values 105 



Relation to current 10& 



Types. 102 



Tide planes 14,17,63,104 



Tide-producing forces 98 



Tropic intervals 10 



Tropic range 13 



Variation in range 100 



Velocity of tidal current 110 



Wind reduction 25,80 



o 



