720 



LENGTH OP TIME OF INSOLATION. 



Table from which may be taken for any given date the number of days to be added 

 (algebraically, as the sign directs) to its supplementary date so as to give the date with which 

 to find from the table of insolations for the given date the insolation for the given date in a 

 southern latitude. 



Gr 



36 



