104 



TABLE 81. 

 ACCELERATION OF GRAVITY. 



For Sea Level and Different Latitudes. 



Calculated from Helmert's formula : 

 rrr gin. 78030 (i +0.005302 sin. 2 $ 0.000007 sin. 2 2$) 



To reduce log. fir (cm. per sec. per sec.) to log. g (ft. per sec. per sec.) add log. 0.03280833 = 8.5159842 10. 



CORRECTION FOR ALTITUDE. 



0.0003086 cm. per meter when altitude is in meters. 



0.000003086 ft. per foot when altitude is in feet. 



SMITHSONIAN TABLES. 



