DAILY ATMOSPHERIC-ELECTRIC RESULTS 



101 



observations on the Carnegie , cruise VII, 1928-1929--Concluded 



i^Values of air-earth current density computed for the three months September to November, 1929, 

 are based on measured values of only one sign of conductivity for each day, the appropriate value for the 

 other sign being computed on the assumption that \ +/\ . = 1.10. (This value is slightly lower than the 

 grand average of X+/x. obtained from 250 daily values in the period May 15, 1928 to July 28, 1929, which 

 is 1.16.) 



