preceding month so that it was distributed in the vicinity of 37 N. 

 Except for some complexities in the nei/;hborhond of 167°E and 176'^E, the 

 isotherms ran approximately parallel in an east-v;est direction. 



Temperatures at the 50-meter level were about 2° lower than those at 

 the surface. No great complexity was seen at this level; the slope was 

 A° of temperature in 4-° of latitude, and the east-west profiles were 

 roughly parallel. 



At the 100 -meter level the temperatures were about 2' lower than 

 those at the 50-meter level, and there were some complexities in the 

 vicinity of 173'^E. The slope was 2° in 3° of latitude and the east and 

 west profiles were approximately parallel. 



Temperatures at the 200-meter level were about 1° lovier than those 

 at the 100-meter level and the slope was generally the same. 



As for the distribution of specific gravities, at the siorface there 

 was a boundary at about 35°N, north of which the values were lew, with a 

 figure of 2550, while to the south hirher values to 2600 viere found. The 

 distribution at the 50-mctcr, IGO-meter, and 200-r.otcr levels was roughly 

 the same as that at the surface, but at the 50-meter level water with the 

 rather high chlorinity of 2620 was encountered east and west of 170°E. 



July 



Eight vessels were in operation durin^;. the month and they covered 

 the area between 33°N and 4.3°N in Ixcas 1 and II, while in /iroa III they 

 were between 3A'^'^ and ii.0°N. In Areas I and II the sijrface tempsratures 

 ranged from 17"^ in the north tc 22° in the south for a slope of 5° in 10° 

 of latitude. The zones of 17"^ - 19° water showed a rapid northward move- 

 ment of about 5° from their position of the previous m':>r.th, placing them 

 in the vicinity of 4-2''N. In Area III the surface water ten-'oratures 

 were 20° - 21°, somewhat higher than at the same latitudes in the other 

 two Areas. 



At the 50-meter level the temperatures showed a marked irop of 5 - 

 6° from those at the surface. In jlreas I and II the slope was a gentle 

 one of about 7° in 10° of latitude, but in Area III there was a steep 

 slope of about 6° to 3° of latitude. East and west the profiles were 

 roughly parallel. 



Temperatures at the 100-meter level were 1" - 3° lower than at 50 

 meters. At the 200-metor level they were 1° lower than at 100 meters. 

 The slopes at these levels were approximately the same as at 50 meters. 



Specific gravities at all levels were around 2500 in the northeastern 

 part of the area and 2600 in the southwest. 



August 



Five vessels were operating during this month. Most of thorn were 

 close to the parallel of ^5°N and a few were on the south side of UO N in 



153 



