PERSONAL EQUATIONS. ERRORS AND RATES OF TRANSIT CLOCK. 



17 



The adopted personal equations are 

 Until 1874, December 17, inclusive, 



After December 17, 



44. The Adopted Errors and Rates of the Transit Clock are shown in Table V. 

 The mean of each observer's group (omitting, of course, the circumpolar 

 stare) is taken and corrected for personal equation, and the mean for the 

 night is then found. The loss in 24 hours corresponds to the middle time 

 between the times for which the error is adopted. The adopted rate cor- 

 responds to the time for which the error is adopted. This adopted rate has 

 only been used during the six hours preceding and following the time to 

 which it corresponds. At other times the " loss in 24 hours " has been used 



