METEOROLOGICAL OBSERVATIONS 121 



Passing to the radiation temperature, it will be seen that 

 there is a considerable difference between the values at the 

 two stations : the thermometer at the upper station shows a 

 higher reading than that at the lower during every month in 



*.' 



-n 



-r 



jfir Temperature. 



ar h lempen tare, 



JV J>. Jo. F. M. 



* M. Ja. Jul. 

 FIG. 17. 



S. O. 



o I 



the year (Tab. Ill, Fig. 17) : the difference amounting to nearly 

 i -5 in spring, summer and autumn, that in winter alone being 

 less than i. The average difference for the whole year is 

 1-22. At first sight this might appear to offer a contradiction 

 of the statement made below (p. 127) that radiation is more active 

 on higher ground where the air is clearer, than on lower ground ; 

 but there is, in fact, no contradiction, for a so-called radiation 



