*8S -Hi MEASUREMENT op an ARC 



yrhun and Yervacmdah] and then recourfe is had to the laft meafurei 

 bafe n-ear.C^^ Hence what is given here, together with what ap- 

 : pears : in: the 10 th- arid prefent volumes cf the Refearches, will 

 .furhiih an entire account :©f the whole arc in its prefent ftate of pro- 

 g'refs, and; itsi future extenhon will, I hope, be more in the order of 

 time, a?", a meridional feries will be chiefly attended to> and it may 

 ■be gratifying to the intelligent reader, who. is inierefted in fubjefts of 

 .this nature,, to know that thefe operations are to be extended through 

 the Dekkiin ; which, if no local difficulties occur, may be carried to the 

 northern confines of the Niz,am's dominions,- confiderably beyond 

 the latitude of 20 -degrees. It however may be doubtful as. to the 

 practicability of extending it fo far, in the prefent Rate of that country, 

 but I hope I (hall have no difficulty in penetrating as far as the latitude 

 cf 18 degrees, and perhaps my next obfervations may be ©n the banks. 

 of the Goodavery, It is fcarcely neccfiary to mention here, thgt the 

 number of years elapfed fince the commencement of this arc in 1805,, 

 has been owing to the time taken up in extending the furvey, over 

 the whole Peninfula* The bale near Ga&ty has been the foundation of 

 a feries of triangles connecting Maful'.patam. with Gea, which I expe& 

 will be completed in 1813, and after that my whole attention will be 

 directed to the northward, where having only the meridional feries 

 to attend to, mj progrefs, in that direction mud confequently bt 

 more rapids 



Besides, the purpofe of- extending this arc to the northward, there 

 Is. another object of equal importance, which is the meafurement of a 



perpendicular arc, in a latitude as far north as it is poffible to pene- 

 trate* It is from thefe perpendicular, arcs, that a fcale is obtained for 

 computing the relative- longitudes; and when this furvey b- carried 



