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SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 70 



and August. In figure 89 the weak lines show the variations in the 

 average winter temperature. These are marked W and are drawn 

 full. The summer temperature is given by the dotted *lines marked 

 S. The heavy lines S-W show the variations in the difference 



Figure 89. Temperature anomalies of the three summer months (curves 

 S), the three winter months (curves W), and the difference between these 

 anomalies for summer and winter (curves S-W). The lowest curve indicates 

 the yearly mean of the daily number of prominences (P) according to observa- 

 tions in Rome and Catania, and for the relative sun spot numbers (SF). 



between the temperatures of winter and summer. It is striking 

 how much less the summer temperature varies on the whole from 

 year to year than the winter temperature. It may be seen that 

 the variations in both summer and winter temperature and in the 

 difference between them are considerably less for the Pacific coast 



