^44 



A N3<:W METHOD OP 



SOth May, 1825. 



The moon's western limb passed the meridian per solar chronometer at 

 Antares ditto, ... .. ». .. •• 



Interval in solar time, .. •• •• •• •• •• 



Acceleration of sidereal on solar time, .. 



Interval in right ascension between transit of moon and Antares, 

 Right ascension of Antares per Ephemeris, 



11 

 12 



M. 

 33 : 

 38 : 



S. 

 10.51 

 23.2 





1 : 05 : 12.70 

 10.68 





1 : 05 : 23.38 

 16 : 18 : 45.87 f" Pi 



Rn. moon's limb, .. .. .. •• •• •• 



]) 's Sem. 16': 11" Dec. 20°: 33 and 16'. 183x1.008=17.3=17': 18"= + 



Right ascension of moon's centre, when her limb was on the meridian, 



ARn. moon's limb, ... 15: 13: 22.5 



Sun Rn. at noon at Greenwich, .. ... 4 : 27 : 54.8 



Approximate time, .. .. • 



= 4h. : 52m. : 28s. Greenwich time, 

 P.Pt. increase of sun's ARn. for 4h. 52m. 



10 : 45 



Apparent time at place of observation, 10: 44: 47.7 



Moon ARn. from Ephemeris : — 

 29th May Midn... 218: 8:31 1st difference. 

 30th May Noon.. 225: 35: 33=7: 26: 42 2d difference Mean. 

 SOth May Midn... 233: 7:58 7:32:45 6:03) ^ 

 31st May Noon.. 240:44. 33 7:36:35 3 : 50 J. tll.'^Q 



15 : 13 : 22.49 

 1 : 9.20 



15 : 14 : 31.69 

 = 228° : 37.53 J 



Vide Rule 1st. 



Moon's motion in 1 2 hrs.7: 32'. 45". 



J =' 



Ditto 4h.= .... 

 Eqn. 2d difFs. .. 



2°: 30 



47 

 27 



and 5h.= 3° 

 for v.- hours 



08: 



37. 

 29. 



IV. P. M. 



ARn. at Noon .. 



2: 30. 

 225: 35: 



14 

 03 



V. P. M... 3: 

 IV. P. M... 2 : 



08: 

 30: 



08. 

 14. 



Moon's Rn. at ) 

 IV. P. M. at V 

 Greenwich, . . ) 



228 : 5: 



27 



Moon's 1 

 hourly > 

 motion. ) 



37': 

 37 



54. 

 9. 



"f Vide Rule 3d. 



Moon observed Rn. at Calcutta, 



Moon Rn. at Greenwich, at IV. P. M. .* 



Difference, .. .. « 



Ihen, 9 e •. e« 



Hourly motion. 

 As 37'. 9: 60m. ::32'. 47: 51m.: 23s. 

 Time at Greenwich, when the moon's centre 



had right ascension. 

 Time at Calcutta, 



15h: 14m: 31-69 is 



Longitude,, .... ». •» 



Place of Observation East of Fort William Flag- 



Longitude of Flag Staffs ...» . . . • 



228 



°: 37 



/ . 



56" 



228 



: 5 



: 



27 





3iJ 



; - 



26" 





32. 





47 



4h: 



51m: 



23s 





10: 



44: 



47. 



7. 



5; 



63: 



24 



7, 



9 • • » 



e « 



7. 



0. 



,. 5 



: 33: 



17. 



7. 



