HYDROGRAPHIC TABLES. 



3A 



HYDROGRAPHIC TABLES. 



Table I H. Normal value of the acceleration of gravity at sea-level. 



Table 2 H. Normal increase of the acceleration of gravity with the depth. 



Example : 



Latitude, 42 27', table 1 h gives.... 

 Depth, 4260 meters, table 2 H gives . 



9.8039 

 0.0094 



9-8I33 



