104 



Table 81 . 

 ACCELERATION OF GRAVITY. 



For Sea Level and DiUerent Latitudes. 



Calculated from Helmert's formula : 

 grrr 911.78030 (i +0.005302 sin. 2 * — 0.000007 sin.'2<I') 



To reduce log. g (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. 



