74 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 70 



For this easterly part of the ocean we have furthermore found 

 that the temperature variations of the coldest seasons of the year, 

 February and March, are very similar to the variations of the yearly 

 means themselves. This holds as we have said above, (see figs. 33 

 and 34) for the easterly Danish fields. We believe that we may 

 safely assume that this is a general rule for the North Atlantic 

 Ocean. 



If we return again to Liepe's most southerly stations, we find some 

 relations of considerable interest. The yearly curves for his sta- 

 tions 7 and 8, at 8° and 2° north latitude, which lie midway of the 

 Atlantic Ocean between Africa and South America have a certain 

 similarity with those for his" more northerly stations, but the maxi- 

 mum is displaced to the year 1901, whereas in the trade wind region 

 it fell in the year 1900, and still further north, even in the year 



1808 99 1?PP 1 



LSt.3 



Figure 38. Curves for the anomalies of the surface temperatures for 

 Liepe's station 3 (L. St. 3) for the year (September i to August 31) for 

 February and March as well as for our fields between 2J° and 39° north 

 latitude and 10° and 20° west latitude for February. 



1899. It is surprising that the similarity goes so far when one 

 considers that Liepe's stations 7 and 8 lie in aonther ocean current. 

 Station 7 lies, at least in the northern summer, in the equatorial coun- 

 ter stream where this current in August and September, under the 

 influence of the southwest monsoon, reaches its greatest develop- 

 ment. On the other hand, in the time interval from December to 

 May the station is penetrated by the northerly equatorial current 

 which reaches its strongest development in March. The station 8 

 lies in 2° to 3° north latitude, 29^° to 30^° west longitude, within 

 the region of the south equatorial stream. Only from February 

 to the middle of April does this current often show itself southerly 

 of 3° north latitude and it reaches its most considerable intensity 

 in July. 



Yearly curves for these two tropical stations show nevertheless 

 a special type and have as we have said much similarity with the 

 February curves for the same stations (see fig. 15). They have 



