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11
lignedes, umiddelbart efter at Observationerne vare tagne,
med Chronometer Frodsham. og hvis. Angivelser paa Stedet
reduceredes til dette. Ved Eftermiddagsobservationerne
benyttede jeg Frodsham.
Indexfejlen fandtes ved Middag = -f’2’ 8."8 ± 5". 5 Obs.
om Efterm. =.-f 2 1. 7 ± 2 . 3
8 a. m. 2 p. m. 8 a. m.
Barometer 750/""6 750,""n6 749.""n2
Temperatur 8.°9 9.°0 8.°9
Efter Tidssignal, observeret i Bodø den 24de .Tuni,
er for Frodshanis Chronometer beregnet for
Eftermiddagsobservationerne Correction til Greenwich Middeltid
— 0Ä 52"’ 12/7.
Som foreløbige Værdier er sat
ff o = 67° 29’ 50" and l0 = O’’ 48’» 29/1 E. Greenwich.
1877. Juni (June) 26.
diately after taking the observations, was compared with
the Frodsham chronometer, and its several indications
reduced on the spot to those of the latter timepiece. For
the afternoon-series. I used the Frodsham.
Index-error at Noon = + 2’ 8."8 ± 5". 5 Observations.
— after Noon = + 2 1. 7 ± 2 . 3
8 a. m. 2 i). m. 8 a. m.
Barometer 750."""6 750."""6 749."""2
Temperature 8.°9 • 9.°0 8.<>9
The Frodsham correction to Greenwich mean time, as
determined from the time-signals at Bodø on the 24th of
June, was found to be
— O’’ 52’". 12/7.
As approximate values.
Ckron. Frodsham. 2b’ J
13™ 6/6 © 92» 13’ 45" — 7"
14 6. 6 13 20 — 6
15 6. 6 12 50 — 3
19 6. 6 10 0 — 3
20 36.6 . 8 30 — 9
2 I 58- 6 7 30 +’ 4
22 36.6 6 3® — 6
24 30. 6 0 91 i 35 + 7
25 28. 6 0 10 — 2
26 38.6 90 59 5 + 14
2 7 46. 6 57 30 + 14
29 8. 6 55 30. + 14
29 51.6 54 0 + i
30 54-6 51 50 — 16
Differentserne J mellem de observerede og beregnede
Højder ere tagne efterat den benyttede Solradius er
formindsket med 7."2 forat tilfredsstille Observationerne af
begge Solrender.
Efter de mindste Kvadraters Methode har Hr. Astrand
fundet
å = ± 5."1; hf - — 2."6
Forudsættes en sandsynlig constant Fejl af + 10".
bliver dens Virkning paa den beregnede Bredde ± 9."9.
og Resultatet bliver
(f - 67° 29’ 47."4 ± 10."O.
Clirou. Frodsham. 2’h’ . J
4’’ 46™ 3I.*7 0 570 40’ 0" — 14"
47 26.7 30 0 - 2
48 19.0 20 0 + 4’
49 12.5 10 0 — 2
50 5 0 0 + 4
50 58.7 56 50 0 + 1
51 51-0 40 0 - 2
52 43- 8 30 0 — 3
53 35- 5 20 0 — 8
55 37-0 Q 57 00. + 4
56 30.0 56 50 o’ + 3
57 22.0 40 0 - I
58 15.8 30 0 + 6
59 .8-5 20 0 + 8
5 0 0.2 io 0 + ■
0 54- 5 0 0 -j- 12
i 45- 5 55 50 0 — 3
2 38.8 • 40 0 + 7
The differences, J. between the observed and the
computed altitudes, were found after diminishing the
assumed semidiameter of the sun by 7."2. to satisfy the
observations of both limbs.
By the method of the least squares. Mr. Astrand
found
l."4; JI — -f- 0/69 ± 0.-21.
Assuming a probable constant error of ± 10", the
effect on the computed latitude will be ± 9. "9. and the
result therefore
ff = 67« 29’ 47."4 ± 10."0.
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