Schlagintweit, Hermann von; Schlagintweit, Adolf; Schlagintweit, Robert von: Results of a scientific mission to India and High Asia: undertaken between the years MDCCCLIV and MDCCCLVIII, by order of the court of directors of the hon. East India Company (Band 1): Astronomical determinations of latitudes and longitudes and magnetic observations: during a scientific mission to India and High Asia (Leipzig, 1861)

132

ASTRONOMICAL OBSERVATIONS OE LATITUDES AND LONGITUDES.

Sun, Upper Limb.

h m e o i ii o i ii

3) 2 51 23 310 16 50 24 50 55

4) 2 59 41 312 18 5 25 59 10

5) 5 2 44 342 20 20 39 22 50

6) 5 11 14 344 49 30 39 46 5

P. M.

ll m s o ■ i ii o i ii

7) 5 48 57 356 6 35 40 31 44

Sun, Lower Limb.

h m s o l ll o l ll

8) 6 32 39 9 5 10 38 47 20

9) 6 39 48 10 30 15 ' 38 27 20

( 754-3 Tnillim. ' ,. ,. [ 23°-0 C.

carom. I lemp. oi Air I

I 29-697 inches. / 73 4 Fahr.

At Udelguri, the observations were calculated more in detail, in consequence of

the greater number of observations, and on account of this place being well situated

as a starting point for some longitudes by chronometer.

First Approximation.

For the first approximation, the mean of observations 3 and 4 = 1., and obser-
vation 7 = II., are chosen, as they are nearest the meridian. They are calculated by
Method I.

The usual corrections for these series are:

I. 11.

in in
"Refraction.......— 1 58 — 1 6

Parallax........ + 7 + 7

Semidiameter.....— 16 18 — 16 18

Sum of Corr. . . — 18 9 — 17 17

I. Ii corr. = 25 6'9 8 = - 22° 52-8
II. V corr. = 40 14-4 h' = — 23 0-5

Latitude N.................. 26° 45'-0

Mean Noon (corr. for Equation of Time) 5h 44™ Is

Second Approximation.

Comparison of the single observations with the elements obtained by the first
approximation.

Formula;: A a (p. 120).