92 



INDEX 



Page 

 Tidal bench marks. (See Bench 



marks. ) 

 Tidal datum.s. (See Datums, tidal.) 



Tide gages 1 



Automatic. [See Automatic 

 tide gage. ) 



Fathometer 5 



Pipe 4 



I'res.sure 5 



Tape 3, 29 



Tide staff 2 



Tide house 28 



Tide observer 41, 51 



Tide reducers for soundings 78 



Graphic method 78 



Height allowance 80 



Time allowance 80 



Page 



Tide staff 2,29,51 



Tide staff support 2 



Time to be used 43, 60, 64 



V 



Vitrified scale for tide staff 2 



W 



Weekly report 47 



Weight, counterpoise 17, 35 



Tension 17, 37 



Wind effect 54 



Wire, portable gage 24, 57 



Standard gage 17,35,49 



Wooden float-well 27 



o 



