94 



Astro7iomical Tables mid Ohservations. [Jan. 



accuracy— 1 am far from attacliing any particular importance 

 to this trifle, but as an Astronomical table formed upon 

 modern research, it is I believe the first ever constructed by 

 any of my countrymen in this part of the peninsula, and as 

 such will, I hope, meet with your protection and favour, lu 

 order to she V/ the principle and utility of the table I have 

 thought it necessarv here to give an example of an occrdati- 

 on and of an eclipse of the sun as follows. On consulting 

 the Nautical Almanac it appears that on the (Sth of Novem- 

 ber 1834 X Capricorni will be occulted by the Moon at some 

 part of the Earth and probaMu will be visible at Madras at 

 about 2h. SO/??. Greenwich mean time; to discover if it loill 

 be visible I proceed as follows. 



h m s 



Greenwich Mean Time 2 30 0 

 Longitude of Madras 5 D 



Madras Mean Thne 7 51 9 



at which moment the angle from the meridian is '^l'^ 1 5m. computing 

 from tile I\autical Almanac. 



Rigiit Ascension, Declination. 



h m s- o ' " 



The Moon's Mean 34 7,79 19 13 28 S. 



Correction from the 



table — 1 24 , 75 +• 29 20 



The Moon's apparent 2i 32 43,04 19 47 43 



The star's from Kau- 



ticai Almanac, 21 33 24 , 53 19 36 59 



Difference. 0 41 , 49 10 49 



Moon's Declination, 



19 



47 



4o 



Secant 



Difference Right As- 











cension of l\ioon 











and Star. 





TO 



22 



A. R. Log 



Diiierence declination 





10 



49 



Log. 



Angle at Moon, 



47 



31 



00 



tangent. ^ 











Co sect.) 



DiiTerence Declination. 





10 



49 



Log, 



Distance of Moon's cen- > 





14 



40 



Log. 



tre from tlie Star. s 











Log. ], 0-j42'^f 



The moon's semidiameter being 15' 24" shews that the 

 star is already occulted ; repeating the computation for 7 h. 

 4] ni. 9 s. or 10 minutes before the above time, 1 find tha 



