848 EIGHTH PACIFIC SCIENCE CONGRESS 



are the millivolt produced in the cord. 1.74 millivolt corresponds to 1 

 knot around this district. In this experiment, we found many new facts. 



1) Ivuroshio flows from S.S.W. to the nose of h Peninsula and 

 changes its direction to N.E.E. with a velocity of 1.7 kt to 1.3 kt. 



2) Though we missed to survey well, it can be said from our 

 other results that this current collides against Ohshima Island of Iz 7 

 Islands and separates into two ways. 



One flows N.E. and reflects at the Sagami Bay to S.E. Another 

 one flows E. and passes through the south side of Ohshima, and changes 

 its direction to S.E. into the center of Pacific Ocean. 



3) The former passes through between Ohshima and Nojima-zaki 

 to S.E. with velocity 1.3 kt. 



4) It is imagined that a still part exists behind Ohshima Island^ 

 as a center of vortex. 



5) A part of the t^s^o flows shown in 1) may join after this vor- 

 tex and flows N.E.E. to some point off Nojima-zaki, which was sur- 

 veyed in the first attempt. 



6) We found a current which flows S.E. with velocity over 3.3 kt 

 at a point about 34°20'N., 139°40'E. This current comes, perhaps, 

 from a branch of the current through the south side of Ohshima shown 

 in 2). Details of this current are shown in Figure 4. 



(4) Conclusion 



1. We constructed a new G.E.K. with special silver-silver chloride 

 electrode, an electronic potentiometer, special cord made to order, and 

 other accessories. 



2. The calibration shows that this has a good accuracy compared 

 ^\ith the drift method, surveying land points by a sextan to confirm the 

 leal position of the ship. 



3. Three series of the measured value by G.E.K. off the Point No- 

 jima-zaki shoiv the same mean value 1.37 kt from observations of over 

 one dozen, and the individual values deviate ±0.25 kt from the meari 

 value. 



4. Survey with G.E.K. along Iz Islands showed many details about 

 the construction of Kuroshio. 



