MAY 131 



has been hot, or seasonably warm, if the 

 atmosphere is not electric and the sky is 

 not thickly clouded and there is a dead 

 calm or only a slight air. Amid any 

 other set of conditions it is probable 

 that there will be no evening rise. 

 Why ? I have a few thoughts in 

 answer ; but they are not convincing. 



