Table 90. 



VALUE OF GRAVITY ON THE EARTH AT SEA LEVEL. 



g, = 978.039 (i + 0.005294 sin- — 0.000007 •^'"" 2 <P) 

 = 980.621 (i — 0.002640 cos 2 ((>+ 0.000007 coj- 2 (p) 



Smithsoniapj Tables. 



206 



