274i 



ACCOUNT OF TRIGONOMETRICAL 



By table the first, Mangalore flag-staflf is west from 

 the meridian of Balroyndroog 206380 feet, and south 

 98008 feet from the station ; and these converted 

 into arcs according to the above scales, will give 33' 

 58" and 16' 12" respectively, and the latter arc added 

 to the co-latitude of Balroyndroog (equal 76° 52' 8".4) 

 gives 77° 08' 20" for the co-latitude of the point 

 where a perpendicular from Mangalore will cut the 

 meridian of Balroyjidroog at right angles. Then as 

 Rad. : Cos. 77" 8' 20" :: Cos. 33' 58" (the perpendi- 

 cular) '' 77° 08' 22", the co-latitude of Mangalore. 



And again, as Tan. 33' 58" '■ Sin. 77° 08' 20" :: Rad. 

 : Cot. 34' 50", the difference of longitude between 

 Balroytidroog and the flag-staff at Mangalore, 



By proceeding in the same manner with the other 

 places on that coast, we shall have their latitudes, and 

 their longitudes from the meridian of Balroyndroog 

 as follow : 



By table 2d, the observatory at Madras is 1 2700.9 

 feet east, and 193370 feet north from the station at 

 Carangooly, which converted into arcs give 20'54".45 

 and 31' 57.78 respectively ; which being applied to 

 the meridian and its perpendicular, passing through 

 the observatory, and computing spherically, as in the 

 last case, we shall obtain 13° 04' 8".7 for the latitude 

 of the observatory, and 21' 27".81 for its longitude 

 east from the meridian of Carangooly. And by pur-^ 

 suing the same method of calculation, we shall have 

 certain places on the Coromandel coast referred to 

 the meridian of Carangooly as follow : 



