in order to afcertain the height of Mountains . 519 
"Determination of the angles hy the equatorial. 
2 
- 
On the azimuth 
circle. 
On the equat. circle, the" 
horary being converted 
into gradual divihons. 
& A by the iff obfervation — 
0 / // 
58 27 30 
0 / // 
- 58 28 30 
2d, — — 
29 O 
— 27 3 ° 
3 d, — — 
— 2& 30 
— 29 13 
4th, — — 
— 3 ° *5 
— 29 15 
fL taken four times over on the arch, — 
233 54 i 5 
“ 2 33 54 3 ° 
The mean, — * 
58 28 49 
58 28 37I 
Laftly, the mean of all 
from the 
two circles 
58° 28' 43^' = at a.. 
£ 
b by the i ft obfervation, — 
m 54 45 
~ HI 53 0 
2d, - — 
5 1 3 ° 
5 2 3 ° 
3 d , - — 
50 30 
50 4 5 
jL 
taken three times over on the arch, — 
335 3 6 45 
- 335 3 6 15 
Mean, — — 
hi 52 15 
- hi 5 2 5 
Mean of all from the two circles = m° 52/ 1 
= £- at r. 
common ufing it. It may perhaps not be out of place to remark here, that the 
rods with which the chain was examined, agreed exactly with the fcales of the 
barometers;, at lealt the difference in nine inches, taken in different parts of the 
fcale, did not appear to exceed of an inch. 
(e) The precaution in taking the inclination of the chain every time, if the 
bafe be nearly a plain, as is the cafe in many meadows, feems to be unneceffary"; 1 ’ 
for this fame corre£tion, deduced from the inclination of the bafe oblerved a c 
a and b,. comes out "—0,99 inela, only 0,2 3 inch different, a quantity wholly 
»confiderabk e ■ 
