U) Wind 



The wind force appears to increase at high tide and to lessen at 

 low tide. At other times moderate winds prevail. The direction of the 

 wind is as described under annual changes, and there are no local 

 peculiarities in this regard. 



(5) Rain 



The time of day at which rain falls varies „ 



(6) Sea temperature 



The sea water temperature generally lises and falls directly 

 following upon changes in the air temperature, 



(7) Tides 



There is probably no need for special explanation. 



(8) Surface currents 



Same as preceding itemo 



(9) Waves 



It goes without saying that the height of the waves depends on 

 the force of the wind. 



Well, the Marshall islands, which are located in the northern lati- 

 tudes, ere in general as described above j, but what of tiie seas south of 

 the archipelago which were covered by the investigations described in this 

 paper? To begin with, in the area between Jaluit and Ebon (see the plate 

 showing the track of the Ebon Maru for the positions of these atolls) the 

 wind came steadily from the east-northeast with rather high forces of 

 around 3 or 4-, Cloud cover was from 9 to 10 and the color of the sea was 

 unfavorable. It rained occasionally. While we were anchored at Ebon there 

 were frequent rain storms of considerable violence. At this same island 

 the tidal current in and out of the lagoon ran at around 6 knots and the 

 comparatively fast motor boat which the Ebon Maru carried (speed about 7 

 knots) had a hard time making headway against it. 



From Ebon Atoll we took a course to the south-southwest and crossed 

 the Equator. Northeasterly winds of force 2 to 4- blew continuously all 

 the way to British-controlled Nauru I. (also known as Pleasant I.). (Of 

 course below the Equator the wind force lessened abr uptly, ) Rain squalls 

 from time to time cooled us off, and it was truly a tranquil voyage. 

 Cloud cover was comparatively great. There is a fixed light (lighthouse) 

 on Nauru I. In the light of dawn this island could not be clearly seen, 

 but it appeared tc be made up of a number of comparatively flat islets and 

 it is thought to comprise a fairly large area. An oceanographic station 

 was run several miles to the west of the island (see the table of observa- 

 tions in the next number). Perhaps because of the proximity to the island 

 the transparency of the water was low and there was an aburidanee of micro- 

 scopic life in the water» The difference between the air and water tempera- 

 tures was comparatively slighto There was almost no vertical variation in 

 the sea water temperatures down to 75 meters (at subsequent stations we 

 took the temperatures down to 100 or 200 meters, but there was still little 

 variation) , and the current ran to the west with a speed of about 1 knot. 

 There was a slight ground-swell. 



From the waters west of Nauru we continued for two days and nights 

 on our course to the south"Southwe3t to a point about 6° south latitude 



