( 373 ) 



These annual means for each day of the moon's age had then to 

 he corrected 1^^ for the correction of the parallactic inequaUty, 2"'Mbr 

 the small theoretical corrections derived by Nkwcomh on p. 10 of 

 his ''Jnvesti(/ation^\ However, for iliese annual means some of the 

 latler miji,iit l)e ne*>,lecte(l and besides I might identify annual means 

 of L (I wilh those of the residuals in mean longitude and also 

 annual means of the true age wilh those of the mean age, the 

 argument J). ^) 



For the years J 895 — 97 1 had at my disposal not oidy the results 

 of the transit observations, but also those obtained with the altazimnth. 

 As however in this case the advantage of also using observations 

 made at small elongations is more than balanced by the difliculty 

 of determining their systematic errors, 1 have ultimately oidy used 

 the traiisit observations '■"). 



From these corrected means, which are not given here, I further 

 derived mean xalues for each year for each of the two limbs. They 

 were obtained by combining with equal weights the results for each 

 day of the age of the moon. However, for i-easons to be given 

 hereafter, the values for the ages of 4 and 2(5 daj s were idtimately 

 rejected altogether. 



In this way 1 found: 



1) The corrections actually applied were the annual means for each value of D 

 of the values of Newcomb's Table VII, after they had been corrected for the adopted 

 value of the principal term of the parallactic inequality. 



2) At first 1 had also used the altazimuth observations and from results obtained 

 on the same day wilh botli instruments I had derived for La-j^—Lctj. for obser- 

 vations of the 1st Umb + Ü\12G, and for those of the 2ncl limb — 0s.l22. 



