Index 
Page 
Automatic recorder for Price current meter___________ 22, 47, 49 
PAY mult hcinc esas re nn 3 14 
Azimuth, formulas_____ z 16 
Bifilar direction indicator_ e 18 
Comparison, harmonic.___ o 70 
Compass 2 14 
Cross section of stream, current variations in___ = 7 
Current constituent ellipse_ x 73 
Current hour, mean 57 
Current meter: 
Current surveys-- 37 
Direction of current______ 39 
Frequency of observations__ 39 
’ Mooring of vessel________- 38 
Operating procedure 38, 39 
Organization and equipment__ 37 
Plotting position of station _ 38 
Primary stations__ 0 BY/ 
Records_---_--_- -- 42,45 
Scale of wind velocities 42 
Secondary statiqns.. 37 
Selection of station: 37 
Subsurface observations -- 39; 53 
Verification of log line__ 39 
Deviation of compass _ 
Direction of current_ 
$2) Serra eA 6 CTE CT eae ne 2,4 
Diurnal inequality 10, 57 
Double phases "asta ae eee - 55, 56, 58 
Earth’s rotation, effect on rotary current__ 8 
Ebbing of current 2 
Ekman current meter_ 24 
Instructions for use_ 28 
Rating table ee -- 29, 50 
Factor for velocity reduction_ 58 
Flooding of current_- as 2 
Rireewloat sw Sen seis oi Seas PE ee eee eee oe ee 36 
Fresh water discharge, effect on tidal current_____________ 7 
Galveston Bay entrance, current curve______ 4 
General explanation _______________- 1 
Greenwich intervals. 57 
Harmonic reduction_-_______- 70 
Current constituent ellipse_ 73 
Half-hourly velocities_____ 72 
Harmonie comparison_ == tial 
Hydraulic current_____-______ 78 
Reference of constants to any axis__ 78 
Hydraulic current_--------_---__- 7,78 
Velocity scale for predicting__ 82 
Inferred values 57 
Instruments for observ: 13 
Lightship observations 45 
Reduction of records. - 51, 60, 65 
ogline - 18,39, 45 
Mean current hour---_ 57 
Mean velocity, cross section of stream_ 7 
Mean velocity, flood or ebb period____ 4 
Mobile Bay entrance, current curve________- 4 
Nantucket Shoals Lightship, current curve_ 8 
New York Harbor entrance, current curve 3 
Nontidal current_--------- 
Observations, current sur 
Observations, instruments_ 13 
Observations, lightships_ 45 
(Relonusssase neta aes 17, 45, 46, 51 
Period of tidal cycle_ 2 
Permanent current_____- 1, 84 
Pettersson current meter__________ 35 
Plotting position of current station_ 38 
Plotting reversing currents______-_- 52 
iotting rotary currents_ 9, 60 
Points of compass___-_--_- -- 14,15 
Portsmouth Harbor entrance, current curve_ == 3 
Page 
IPI CONTA WACO oer a seen ae ee Sees ae 19 
Automatic recorder. 22, 47, 49 
Care of meter__ D 21 
Installation__ 5 20 
Ratingstablewes: SSeS en - 24, 48, 49 
Taking meter apart_ 2 21 
Progressive wave___ = 1 
Radio current meter ae EE 30 
Anchoring the buoy_ 30 NS2aatoo) 
Improved model. _.-. 30,34 
Original model_ -. 30,34 
Radio buoy. 30, 31, 39 
Radio buoy with relieving buoy________ _. 40, 41 
Radio current meter operating manual 30, 42 
Rating table 35, 50 
Receiving station__ 30 
Recovering the buoy_ 40 
MapelSca lings 2a sails a Pe Se Lena 30, 34 
Rating table: 
Mkmanicurrentpme tenes ee eee eee oe ee 29, 50 
Price current meter__ 24, 48, 49 
Radio current meter___-___- -. 35, 50 
Reduction of current records_ 47 
Current constituent ellipse____ a 73 
Direction of current________ _-- 50,55, 60 
Double phases______- --- 55, 56, 58 
Greenwich intervals. ated 57 
Half-hourly velocities_ 72 
Harmonie reduction_ 70 
Hydraulic current_ 78 
Inferred values____ 57 
Mean current hour_________ 57 
Record of current velocity___________ 47 
Reference of harmonic constants to any axis_ 78 
Reference}stationme ss s= ane me mne 57 
Reference to currents_ 58, 59 
Reference to tides___ 54, 57 
Resolution of velocities_ 60 
Resultant current__- 64 
Reversing current 52 
Rotary currents___ 60, 65 
Subordinate station_______- 57 
‘Tabulation of rotary currents___ 64 
Tabulation of strengths and slacks_ 53 
ime |companisonss2222 = Lite 
Velocity reduction factor_ 58 
Weak reversing currents_ 55 
Wind reduction_____-_ Saw 83 
Reversing currents__ 
Rotary, currents:222-2 22 
San Bernardino Strait, current curve______ 
San Francisco Bay entrance, current curve_- 
San Francisco Lightship, current curve____- 10 
Scale of wind velocities_____________ 42 
Seekonk River, current curve 3 
Semidiurnal current_______ 2 
SOI Ne 17 
Slack water_ 2, 53, 55 
Stationary wave_ 
Stray line_-------- £13545 
Strength of current__ 2; 53, 
Subsurface current -. 39, 53 
Swiftsure Bank Lightship, current curve 9 
Swinging ship Sesser sO ee Cin ee ee 16 
Tables. See Table of Conte 
Temporary currents. 
Tidal current. 
Time of current in relation to time of tide_ 
Varia tionyofcompass ease == =e een 
Variation of current in cross section of stream_ 7 
Velocity curves, preparation for tabulation ____ -- 52, 53 
Velocity of current in relation to range of tide____________ 16 
WVielocitryered ction {act or=sasss eae ansnm iene nnn nRLaEe 58 
Velocity unit__._________ 47 
Wind observations_ 42, 46 
Wind treductionS sin Se eee ee ee ne 83, 85, 86 
iWind&velocityscale:-=<=sss ses <7 Saas ee ala 42 
