INDEX 



Page 



Ages of tide --- - 14,100 



Annual variation in tide 15 



Apogean range 12, 17, 100 



Appendix 98 



Bench marks 42 



Boston (central portion) 45 



Boston Light, Little Brewster Island 43 



Boston Navy Yard 4,5,6,7,8,9,44 



Brookhne 47 



Cambridge 47 



CharlestQwn 44 



Chelsea Creek entrance 44 



Crow Point, Hingham Harbor entrance. 49 



Georges Island 44 



Lovells Island 43 



Neponset River railroad bridge 47 



Nut Island 48 



South Boston 15,46 



Weymouth Fore River bridge 48 



Bifilar current indicator.. 22 



Boston City base 42 



Boston Harbor: 



Adjusted tidal data 18,67 



Condensed current data 27,89 



Summary of surface currents 25, 82 



Temperature and density of sea water ... 28, 90 



Tidal data, 1847-1926 18,65 



Boston Light Vessel: 



Current observations. _ 24 



Harmonic analysis 25,81 



Set of nontidal current 25,80 



Tidal currents _ 25,79 



Wind reduction _. 25,80 



Boston low-water datum 41 



Boston Navy Yard: 



Ages of tide 14 



Apogean range 13 



Bench marks _. 4,5,6,7,8,9,44 



Box gauge 4 



Density of sea water 28,90 



Diurnal inequalities 13 



Diurnal ranges _ 13 



Dry Dock No. 1 _ 3,6,7,8,9 



Duration of rise of tide _ 11, .50 



Expansion of seams in dry dock 3, 8, 9 



Extreme high waters. 52 



Extreme low waters 54 



Extreme ranges 13 



Greenwich intervals 11 



Harmonic constants 14,64 



High and low water heights 11,50,51 



Letters from observer, 1857 3 



Leveling connections 8 



Lunitidal intervals 10,50 



Mean rise interval 10 



Mean sea level 14 



Mean tide level 14, 56 



Neap range... 12 



Neap. tide level 14 



Observations 2 



Observations since 1877 7 



Observers 3, 5 



Perigean range 13 



Porcelain tide staff '_ 6 



Pressure or glycerin gauge 5 



Range of tide 12, 51 



Reduction of records 10 



Reduction to a uniform datum 7 



Repairs to dry dock __. 3, 6 



Self-registering tide gauge 5 



Spring range 12 



Spring tide level 14 



Summary, ranges and inequalities.. 63 



Summary, tide planes... 63 



Page 

 Boston Navy Yard— Continued. 



Summary, time relations 62 



Temperature of sea water 28, 90 



Tide scale 2 8 



Tide staff _. 2 



Tropic lunitidal intervals 10 



Tropic ranges 13 



Commonwealth Pier No. 5: 



Annual variation.. 15 



Bench marks 15, 46 



Density of sea water 28, 90 



Difference between mean tide level and 



mean sea level 23 



Duration of rise of tide ,57 



Extreme high waters 60 



Extreme low waters ._ 60 



Float well 14 



Harmonic constants _ 17, 64 



High and low water heights 57, 58 



Lunitidal intervals 17,56,57 



Mean sea level 61,62 



Mean tide level 61 



Monthly means.. 15 



Observations 14 



Range of tide 17, 59 



Reduction of records _. 15 



Summary of ranges and inequalities 63 



Summary of tide planes 17,63 



Summary of time relations 62 



Temperature of sea water 28,90 



Tide staff 15 



Current: 



Definitions 106 



Duration of slack m 



General characteristics 106 



Harmonic analysis 2.3,25,79,81 



Mean current hour 19 



Mean values.. 112 



Moon Head. 27 



Nontidal. no 



Rectilinear 107 



Relation to tide 109 



Rotary 107 



The Narrows ». 26 



Variation in strength 107 



Velocity no 



Wind reduction 25,80 



Current charts 28 



Current data: 



Condensed data 27,89 



Observations, 1847, 1848 18,68 



Observations, 1860, 1861, 1863 19,70 



Observations, 1902 __. 21,72 



Observations, 1926 21,73 



Observations, Boston Light Vessel 24,79 



Summary of surface currents 25,82 



Current meter j 21,22 



Current pole 21 



Datums, tidal _. 41, 104 



Boston city base 42 



Boston low-water datum 41 



Navy yard datum 42 



Sea-level datum 41 



Density of sea water 28,90 



Difference, mean sea level and mean tide 



level 62 



Distance traveled in a tidal cycle 111 



Diurnal age 14, 101 



Diurnal inequality 13,101 



Diurnal range 13 



Dry Dock No. 1 7 



Expansion of seams. 3,8,9 



Repairs.. 3,6 



115 



