of a Base Line on the Coast of Coromandel. 
111 
Meridional observations of stars for determining the lati- 
tude of each end of the base line. 
True zenith at south 
Distances at next 
Latitude of south 
Stars. 
end of base. 
southern station. 
end of base. 
(2 in Centaur 
7°° 54' 3" 
— 
n° 33' 34" 
a in Centaur 
7 1 3 1 *9 
— 
11 33 4 8 
Antares 
37 3° *4 
— 
11 33 4° 
a ; in Centaur 
— 
7 1 2 7 4 
11 33 34 
/ 3 in Cross - 
— 
7° ° 5° 
11 33 2 
■yj in Ursa Major 
— 
3 8 53 16 
n 33 H 
i G in Centaur 
— 
70 49 11 
11 3 2 43 
Antares 
— 
37 2 5 58 
11 33 2 5 
7 ] in Ursa Major 
— 
3 8 53 1 
n 33 2 9 
12 in Centaur 
— 
70 50 11 
11 33 43 
u in Centaur 
— 
71 26 58 
11 33 27 
7 i in Ursa Major 
— 
3 8 53 16 
11 33 14 
(2 in Centaur 
— 
7° 4 9 26 
11 32 38 
Mean latitude of south end 
11 33 22 
+ 5 4 2 
Latitude of north end of base line 
11 39 4 
To settle the position of the base, with respect to the 
meridian, the sun's bearing from each signal, and his azi- 
muth, were observed several times, both with the theodolite 
and the Hadley ; and, having made the necessary computa- 
tions, I became satisfied of the justness of an opinion I had 
before entertained, that the Hadley is by far the best instru- 
ment in general practice for such purposes: for though the 
theodolite has the advantage, from its fixed position, and 
