LUNAR EFFECT 



If divided into western and eastern hour-angles, the annual numbers stand as 

 follows : 



1840 

 1841 

 1842 

 1843 

 1844 

 1845 



Western hour-angles. 



. 916 

 . 1523 

 . 1618 

 . 1724 

 . 3288 

 1700 



Eastern hour-angles. 



909 

 1552 

 1639 

 1734 

 3334 

 1707 



Sum 



. 10769 



10875 



The preceding mean results will be found inserted in their proper place in the 

 following abstract of the mean monthly values for each observing month between 

 1840 and 1845. 



Proceeding in this way the following results are obtained for the different 

 months discussed. 



' The tabular values for this month are expressed in parts of the new or observatory scale, the quanti- 

 ties having been converted from parts of the old or college scale into parts of the new scale. 



8 The tabular numbers refer to the new scale, the values for the first eighteen days of the month having 

 been converted as above. 



3 Attention was paid to the half-monthly normals for the hour 8 h - 19 m - (mean observatory time). 



4 The index correction, on and after the twenty-third day of the month, was applied before the 

 differences were taken. 



