108 



DIURNAL INEQUALITIES. 



+20 



+2O 

 +10 



+2O 



+ 10 







+2O 



\ 



\ 



\ 



\ 



\ 



\ 



\ 



\ 



\ 



\ 



\ 



\ 



o April 



o May 



o June 



o July 



-10 



o August 



o September 



Z 4 6 8 10 NOON 2 4 6 8 10 12 MID'T 

 Fig. 5. Horizontal Force. (Unit ly.) 



