90 



ESTDEX 



c 



"Page 



Cleaning pencil screw 45 



Cleaning stylus screw 59 



Cleaning tool 25,27,46 



Clearing float-well intake 46, 59 



Clock movement, portable gage 20, 58 



Clock unit, standard gage 6, 49 



Clogged float-well, indications 50 



Closing error, leveling 41 



Comparative note, portable gage 59 



Standard gage 43 



Comparative readings, tabulations. 61 

 Comparison of simultaneous ob- 

 servations 72, 75 



Conversion of centigrade to Fahr- 

 enheit scale 83 



Correction for longitude of moon's 



node 74 



Correction to plane of flotation, 



tape gage 31 



Counterpoise, standard gage 17, 35 



Counterpoise drum, standard gage_ 16 

 Counterpoise spring, portable 

 gage 21, 57 



D 



Datum pencil 16 



Datums, tidal 76 



Density observations 81,83 



Determination of plane of flota- 

 tion, tape gage : 30 



Difl5culties, operating, standard 



gage 49 



Diurnal high water inequality 74 



Diurnal low water inequality 74 



Duties of tide observer, primary 



tide station 41 



E 



Effect of wind 54 



Establishment, primary tide sta- 

 tion : 25 



Secondary tide station 54 



Expenses, emergency 48 



F 



Factors F(Mn) and Fi 74,75 



Fair leader, portable gage 23 



Fathometer 5 



Field reductions 59 



Fixed stafr 2 



Float, portable gage 24,57 



Standard gage 17, 35 



Float drum, portable gage 20 



Standard gage 16 



Float pipe, portable gage 24, 56, 59 



Float well 26 



Clearing intake 46,59 



Clogged well, indications 50 



Freezing, precaution against 28 



Inspection 51 



Installation 27, 56 



Intake 27 



Iron well 26 



Wooden well 27 



Fae» 



Float wire, portable gage 24, 57 



Standard gage 17,35,49 



Forwarding records to ofllce 47 



Furnishing information to public 48 



G 



Gages, tide 1 



Gears, portable gage 23, 57 



Glass tube for tide stafP__ 2 



Greenwich lunitidal intervals 69 



H 

 Half tide level 73 



Height allowance, tide reducers 80 



Height reductions 61,66,73 



High and low water tabulation 63 



High water 73 



Higher high water 74 



Hour-marking device 16 



Adjustment 44, 49 



Hourly height tabulation 66 



I 



Inequalities :_ 74 



Inspection, primary tide station 50 



Installation : 



Float well 27, 56 



Portable automatic tide gage_ 55 

 Standard automatic tide gage. 32 



Tape gage 29 



Tide staff 29 



Intake coupling 24, 26 



Intake to float well 24,26 



27, 46, 59 



Interpolations, tide record 68 



Iron float well 26 



K 



Kerosene in float well 28 



L 



Leveling 40, 5(2 



Location : 



Primary tide station 25, 51 



Secondary tide station 53 



Low water 73, 77 



Low water springs 77 



Lower low water , 74, 77 



Lunitidal intervals 69 



Comparison of simultaneous 

 observations 71 



Method of checking 70 



M 



Main roller, standard gage 15 



Marigram 15 



Mean low water 77 



Mean low water springs 77 



Mean lower low water 77 



Mean range of tide i 73 



Mean river level 77 



Mean sea level 76 



Measurements, inspection of tide 



station 52 



Multiple tide staff 3 



