84 Prof. Encke on the Berlin AstronomicalEphemerisfor 1 832. 



must devote more time to these observations than is desirable 

 for their other occupations, I have still thought that for the 

 culminations of the evenings I ought strictly to adhere to it. 

 The attempt likewise to apply the same to the morning cul- 

 minations leads, however, in the first six months, to such small 

 stars that it was altogether abandoned in the latter months. 



The shortness of the time, and other circumstances which 

 have likewise retarded the publication of this volume, have 

 not allowed me to fulfil another wish of Mr. Baily, viz. to give 

 the time which the moon employs in passing over the meri- 

 dian. For this purpose, however, the column 6 Moon in the 

 Meridian' may be applied without much trouble. If we de- 

 note the difference of right ascension between two successive 

 inferior culminations by m 9 the true declination (as observed 

 from the centre of the earth) of the moon at the intermediate 

 super-tor culmination by &, and the parallax for the same mo- 

 ment by 7T) we have, with all necessary exactness, the num- 

 ber of sidereal seconds by which the moon's limb passes sooner 

 or later over the meridian than her centre 



109 360 -f m 



sec 5 



6000 360 



= [8-259275] 



The following two tables, which might be calculated with 

 more detail, will at once give numbers whose sum is to be in- 

 creased by the log. of sec. 8, in order to have the logarithm 

 of the above-mentioned number of seconds : 



I. If. 



Thus for January 14-, 1832, we have m = 16 4''9; 

 = 60' 39'H ; 8 = + 18 3'-3, as taken from the Ephemeris, 



[8-259275] means the number whose log. is 8'259275. EDIT 



whence 



