NOTES ON METEOEOLOGIOAL OBSERVATIONS AT PLYMOUTH. 175 



From tliis table it appears that the curve of temperature at Ply- 

 mouth is of a form intermediate between stations wholly exposed to 

 the influence of the sea, and stations more inland. Thus on an 

 average Plymouth is about 1° F. colder than Prawle Point during 

 the winter months, and during the summer months about 1 F. 

 warmer. On the other hand, Plymouth is 1-5° F. warmer than 

 Exeter in mnter, and in summer 1-5° colder. In spring and autumn 

 the temperatures of these stations are almost identical, although it 

 may be observed that in September the temperature of Plymouth 

 shows a somewhat greater fall than occurs, e. g., at Babbacombe, a 

 a phenomenon which, although not fully confirmed by the mean of the 

 longer period, suggests the influence of the high plateau of Dartmoor 

 in some peculiar seasons. 



Humidity. 



The hygrometric conditions are shown by the following readings 

 of dry and wet bulb thermometers, the values being means for 

 twenty-six years as before. 



Dry. 



Means 



50-4 



48-5 



46^5 



•317 



87 



Winds. 



The following table gives the twenty-six years' average of the 

 number of days in each month on which the wind blew from a pointy 

 in each quadrant. 



NEW SERIES. VOL. II, NO. II. 



14 



