437 



Table II. — Diurnal Variation of the Declination related to the Moon's 

 Hour-Angle. Summer Lunations. 



Hours. 



1841. 



1842. 



1843. 



Mean. 







-0'-30 



+ 0'-02 



-0'-36 



-0'-21 



2 



-o-io 



-0-14 



-0-17 



-0-14 



4 



+ 0-22 



+ 0-20 



+ 0-09 



+ 0-17 



6 



+ 0-99 



+ 063 



+ 0-08 



+ 0-57 



8 



+ 55 



+ 0-18 



-0-08 



+ 0-22 



10 



+ 0-53 



-0-22 



-0'31 



+ 0-00 



12 



-0-67 



-0-85 



-0-40 



-0-64 



14 



-1-18 



-0-81 



-0-20 



-0-73 



16 



-0-50 



-0-38 



+ 0-23 



-0-22 



18 



+ 0-06 



+ 0-24 



+ 0-64 



+ 0-31 



20 



+ 0-40 



+ 050 



+ 0-36 



+ 0-42 



22 



-0-01 



+ 0-66 



+ 0-13 



+ 0-26 



Table III. — Diurnal Variation of the Declination related to the Moon's 

 Hour-Angle. Winter Lunations. 



Hours. 



1841. 



1842. 



1843. 



Mean. 







-0M4 



-0M2 



-0'-09 



- A 32 



2 



-0-43 



-017 



-0-09 



-0-23 



4 



-0-32 



-0-12 



+ 0-21 



-0-08 



6 



+ 0-15 



+ 0-22 



+ 0-46 



+ 0-28 



8 



+ 0-17 



+ 0-46 



+ 0-13 



+ 0-25 



10 



+ 0-32 



-0-27 



-0-54 



-0-16 



12 



-0-25 



-0-13 



-0-54 



-0-31 



14 



-0-27 



+ 0-06 



-0-63 



-0-28 



16 



+ 0-48 



-0-15 



-0-09 



+ 0-08 



18 



+ 0-06 



+ 0-41 



+ 0-48 



+ 0-32 



20 



+ 0-64 



+ 0-35 



+ 0-38 



+ 0-46 



22 



-0.18 



-0-27 



+ 0-33 



-0-04 



It appears from these Tables that the summer and winter 

 lunations exhibit the same law, there being in both cases two 

 maxima and two minima, and their epochs coinciding nearly 

 with those already given for the entire year. There is, indeed, 

 an apparent difference in the magnitude of the range ; that of 

 the summer lunations being 0'-89 when the moon is eastward 

 of the meridian, and 1''04 when westward, while for the winter 

 lunations the corresponding ranges are 0'*78 and 0'60. 



