Fig. 5. Electrical conductivity and potential-gradient over the central Pacific 

 Ocean from continuous registrations on the Carnegie , cruise Vn, October 

 and November 1929 



Fig. 6. Diurnal variation in positive electrical conductivity, Carnegie , cruise VH; 



(A) Over the southeastern Pacific Ocean, November 1928 to February 1929, 



(B) Over the central Pacific Ocean, September to November 1929 



165 



