NO. 4 TEMPERATURE VARIATIONS IN THE NORTH ATLANTIC I33 



further out in the Atlantic Ocean (see curves III and IV). The 

 curve I shows a tendency to an opposite march compared with the 

 latter curves, while curve II for the intermediately lying 10° longi- 

 tude field shows a transition between the two types. Of the curves 



{900 



Figure 55. The temperature curves smoothed by twelve-month consecu- 

 tive means for the Danish fields (I to IV), for the three fields from the 

 Central Bureau (V to VII), for the Dutch 10° squares in the Atlantic (VIII 

 to IX), and in the Indian Ocean (X to XI). The inverted prominence curve 

 (P) is given according to the observations in Palermo and Catania (the scale 

 for P is on the left). M gives the character value for the degree of dis- 

 turbance of the three magnetic elements in Potsdam with the scale at the right. 



