NO. 4 TEMPERATURE VARIATIONS IN THE NORTH ATLANTIC 1 35 



I88S 1890 IB9S l300_ 



1885 



1895 



WOO 



Figure 56. Temperature curves smoothed by successive twelve-monthly 

 means for Petersen's stations I to VIII (P VII to VIII- P I to II) in the 

 North Atlantic in the shippin.? course Channel to New York and for Liepe's 

 stations I to VIII (L I-L VIII) in the North Atlantic between 48° north and 

 2° north. Si Ri : the inverted curves for sun spots and prominences according 

 to the observations at the Osservatoria del CoUegio Romano. S2, R2: the 

 same curves direct. PC, the prominences according to the observations in 

 Palermo and Catania. At the bottom is given the inverted curve for the 

 difference of air pressure between 30° north latitude 30° west longitude and 

 Sao Thiago (Cape Verde Islands). 



