720 



LENGTH OF TIME OF INSOLATION. 



Table from whicli 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 lor the given date in a 

 southern latitude. 



& 



36 



