MEASUREMENT of an ARC on the MERIDIAN. 287 



meridian, as I advanced to the northward, by arcs not more than two 

 degrees in amplitude. However as the cafe Hands at prefent, it is fully 

 fatisfa&ory. The whole arc is 6° stizz'^Qy and it may heconfidered as 

 confiding of two fe&ions; one of 2 50' 10". 5, the fouthern one, which 

 gives the degree 60473 fathoms nearly, for the latitude 9 34 44", the 

 middle point of that degree, as appeared from my laft paper, (in the 

 commencement of the p relent volume of the Refearches.) The other 

 feclion is 4 6 J 1 i''.28 in amplitude, and lies to the northward of the for- 

 mer. This gives the degree due to the middle point, or latitude 

 13 2 55" equal 60487.27 fathoms. Alio the degree due to latitude 

 ii° 37' 49', tlie, middle point of the whole arc is 60480.42 fathoms. So 

 that for latitude >9° 34' 44 // the degree is 60472.91 fathoms, and for 

 •latitude 11 37 / 49' / the degree is 60480.42 fathoms, alfo for latitude 

 3 3° Z-SS" tne degree is 60487.27 fathoms. Thefe being deduced from 

 aclual obfervations, afford a regularity in the iHcreafe exceeding my 

 moil fanguine expectations* 



ThiE recent meafurement, is a continuation of the former triangles, in 

 1805 and 1806, commencing on the d'Alance Paughur and Yerracondah 3 

 and terminating at the ftation of obfervation about three miles Weil 

 from Gooty, where a bafe line has been meafured as a verification to 

 the pre lent, and a foundation for a further extenfion of a future feries 

 -of meridional triangles. And to render this account of what has al- 

 ready been done complete, I have here included the whole number d£ 

 triangles, from the bafe in- Coimbctoor-, to that near Gooty. A paiticular 

 account of the meafurement of the bafe near Bangalore, has already 

 been given in the 10th volume of the Afialick Refearches, of courfe it is 

 not neceflary to repeat it here. That bafe is therefore only taken up 

 as a new datum, from which, the triangles are carried fouthward to 

 the itations Ponnajfmalli and Kumtelarine hill, and northerly to Pau- 



