296 ACCOUNT OF TRIGONOMETRICAL 



line be measured near Mangolore, from which all 

 these distances, near the sea, should be derived anew, 

 when a more minute survey of the coast is made. 



As the situation of the places on the Malabar 

 coast, and their relative positions, with respect to the 

 observatory at Madras, and other places on the coast 

 of Coromandel, constitute a most important part of 

 this survey, I have left nothing undone, in that re- 

 spect, to give full and entire satisfaction. But the 

 great accuracy required, in these low latitudes, in as- 

 certaining the length of a degree of longitude, has 

 called forth more than ordinary attention; and I 

 have reason to hope, from the many favourable and 

 concurring circumstances, that my endeavours have 

 been rewarded with success. The three stations best 

 situated for determining the length of an arc, per- 

 pendicidar to the meridian, are Yerracoiidah, Savtn- 

 droog, and Mullapiumabetta ; their respective distances 

 from each other being nearly 67 miles ; and lying in 

 a direction very nearly east and west, the spberiodical 

 corrections for the angles are trifling. All the other 

 great stations have tlierefore been used for connecting 

 the meridian lines, their latitudes and longitudes be- 

 ing com|)uted spherically by using tiie oblique arcs, 

 as obtained on the elliptical hypothesis, the perpen- 

 dicular degrees having been found equal to 6074H 

 fathoms, and the meridional degree 60498 fathoms, 

 in latitude 12' 55' 10", which is the latitude of .SV/tr//- 

 droog, as had by referring to the latitude of Doda- 

 goontah, the great station of observation, (Art. 8) for 

 fixing the point of departure. 



The scale of 60748 fathoms, for the length of the 

 degree perpendicular to the meridian, inlat. \1' 55 10", 

 is considerably diflerent fiom what was formerly 

 obtained fioni the observations made at Carai/gool^ 



