Table 47 (continued) 201 



CORRECTIONS TO REDUCE BAROMETRIC READINGS TO STANDARD 



GRAVITY 



Table 47 A.— Values of 9l ~ 9 ° B 

 9» 



g = standard acceleration of gravity, 980.665 cm. sec."* 

 gi = local acceleration of gravity, cm. sec."' 



B = height of the mercury column, corrected for temperature and instrumental 

 errors. 



(Corrections are in the same units as the height of the barometer, B.) 

 If g« < go, the correction is to be subtracted; if gi > g , it is to be added. 



Height of the mercury column, B 



SMITHSONIAN METEOROLOGICAL TABLES 



