58 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 70 



23 and 25, the mean temperatures found in this way for the 4** 

 longitude fields for each year and for each decade group are given. 

 In figures 24 and 26 are given the corresponding average tempera- 



FiGURE 23. Temperatures of 

 course Channel to New York in 

 4, 1898 to 19 ID. 



the 4° longitude fields along the shipping 

 the first decade group February 3 to March 



F e b r u«a r . 



' ' ^ l. ' l l I'll! i' m i! rrmW^T W l MiMM I l l'ili M ill MM ii r ' ' im iI m ii' mm 



Figure 24. Temperature anomalies of the same 4° longitude 

 for the same time as in figure 23. 



ture anomalies carried out to tenths of a degree. The vertical bold- 

 faced numbers represent positive anomalies, the inclined figures 

 negative ones. Iso-anomalies are given for each degree, the full 

 lines for positive anomalies, the dotted lines for negative ones. The 

 fields with positive anomalies are indicated by cross-hatching. 



