492 Table 167 (concluded) 



ACCELERATION OF GRAVITY AT SEA LEVEL 



g t = 978.0356 (1 + 0.0052885 sin' $ — 0.0000059 sin 1 2<f>) 

 ,= 980.6160 (1 - 0.0026373 cos 2<p + O.0O0OO59 cos a 20) 



0' 10' 20' 30' 40' 50' 



90 983.208 



SMITHSONIAN METEOROLOGICAL TABLES 



