[ 516 ] 
Eail, but much more towards the latter. With thefe- 
four poles, the Eaft car 77 ,, and the two ftations of the ob- 
fervatory, five triangles were formed, conne6ting the two 
ftations of the obfervatory, the relative fituation of which 
to each other would be determined as foon as the length 
of any one of the fides of thefe triangles was known, 
either by comparing it with a bafe meafured in the valley 
below, or with the diftance of the two cavjis fettled in 
that manner. 
I had got fufficient obfervations of zenith diftances of 
ftars with the feftor on the South fide of the hill by the 
15th of Auguft; I prepared therefore for removing the 
obfervatory and inftruments to the new ftation on the 
North fide. This was a work of great labour and dift 
ficulty, as every thing was carried over the ridge of the 
hill on men’s flioulders, and fome of the packages were 
very weighty ; it employed the labour of twelve men for 
a week, and was compleated on the 26th. A large level 
area had been cut away, with great labour, here, in the 
fide of the hill, for receiving the obfervatory, as had be- 
fore been done on the South fide of the hill. A new bo~ 
thie was alfo ere6ted, and places for holding the qua- 
drant and tranfit inftrument, as before, adjoining to the 
obfervatory. 
The badnefs of the weather prevented me from be- 
ginning my obfervations with the fe61:or till the 4th of 
September ; but, that being a clear night, I had a fair op- 
portunity of putting in pra6Uce the method of bringing 
the inftrument into the meridian by the tranfits of the 
ftars 
