178 



U. S. COAST AlSfD GEODETIC SUEVEY. 



Table 5. — Differences to adapt Table 4 to any month, day, and hour of Greenwich 



mean civil time. 



DIFFERENCES TO FIRST OF EACH CALENDAR MONTH OF COMMON YEARS.! 



DIFFERENCES TO BEGINNING OF EACH DAY OF MONTH FOR COMMON YEARS.i 



DIFFERENCES TO BEGINNING OF EACH HOUR OF DAY, GREENWICH CIVIL TIME. 



1 The table may also be used directly for dates between Jan. 1 and Feb. 29, inclusive, of leap years; but 

 if the required date falls between Mar. 1 and Dec. 31, inclusive, of a leap year, the day of month should be 

 increased by one before entering the table. 



