Table 40. 

 ACCELERATION (flr) OF GRAVITY ON SURFACE OF EARTH AND 



DERIVED FUNCTIONS. 



^ = 9.77989 + 0'<'S**' sin' <fr 



=: 9.80599 — 0.02610 cos 2^ metres.* 

 ^ = geographical latitude. 



Smithsonian Tables. 



* From Tlie Solar Parallax and its Related Constants, by Wm. Harkness, Professor of Mathematics, U. S. N. ; 



Washington : Government Printing Office, 1891. 

 t This is length of seconds pendulum. 



169 



