made 'with an invariable pendulum. 
Observations for the Latitude. 
251 
San Bias, 20th May, 1822. Barometer 29,78. Thermometer 83° Chronometer too 
fast for mean time 4 h 4“ 45 s . Polaris on the meridian below the Pole by the 
Chronometer at i h 8” 41 s . True apparent N. P. D. i° 38' 28’',46. 
Face of 
Instrument. 
East 
West 
Chronometer. 
h. m. s. 
1 6 5 
1 7 51 
1 8 41 
1 H 3 
1 16 1 1 
1 18 35 
Time 
from the 
Meridian. 
m. S. 
2 36 
5 ° 
o 
22 
3 ° 
54 
Nat. Versed 
Sines. 
64 
7 
o 
2 74 
535 
933 
302,17 
Observed Ze- 
nith Distance 
and Altitudes. 
34>5 
34 
o / 
70 3 
5 
3 35 
19 56 19 
56 18 
56 20,5 
Latitude - 21 32 22 Cosine 9,9685600 
Declination 88 21 31 Cosine 8,4570295 
Altitude - 19 53 53 Secant 10,0267337 
Constant Log. when Stars are obs. 5,3168000 
Log of 
Correction 
Constant Log. 
302,17 ( + 4) - 
3,7691 232 
6,4802470 
i .77 
Log. 0,2493702 
Altitude. 
19 56 25, 5 
56 26 
56 25 
56 19 
56 1 8 
56 20, 5 
19 56 22,33 Obs. altitude, 
2 27,48 Refraction. 
1,77 Correction. 
0,01 2V C 
19 53 53-°7 True altitude. 
4-1 38 28,46 Apparent P.D, 
21 32 21,53 Latitude. 
June 4th, 1822. 
Face of Circle , West. 
Barometer 29,75 . Thermometer 86° 
c _ _ _0 _// 
June 6th, 1822. 
Face of Circle , East. 
— J 
Barometer 29,80. Thermometer 85° 
Sun’s declination 22 0 39' 57" ,9. 
. 0 / II 
n ,• \ 1st Vernier . So co 0 
Readings 4 , , r 3 
b l 2nd Vernier . 50 10 
Readings j Ist Vernier . x 23 30 
° l 2nd Vernier . 23 25 
Obs. merid. alt. ©’s L. L. 88 50 5 
0 ’s semi-diameter . 4-15 47, 14 
Refraction . . — 0,10 
Obs. zenith dist. ©’s L. L. 1 23 27, 5 
©’s semi-diameter . 15 47, 0 
Refraction . . -j- 1,0 
Parallax . . — 0,78 
©’s true mer. zenith dist. 1 7 40,72 
Declination . . . 22 39 57, 9 
True merid. alt. O’s centre 89 5 52,04 
O’s merid zenith dist. 0 54 7,96 
Declination . . 22 26 42,40 
Latitude, Face East . 21 32 17,18 
Latitude, face west . . 21 32 34,44 
Latitude, Face West . . 21 32 34,44 N. 
East . . - 21 32 17,18 
Latitude by the Sun 
Polaris 
21 32 25,81 
21 32 21,53 
Latitude of Observatory . 21 32 23,67 N. 
