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101
Iagttagelse kan afpasses. Compensationen for
Længdeforandring er praktisk talt fuldstændig.
I den følgende Tabel ere opførte de med ovenstaaende
Correctioner reducerede Middeltal af Lufttrykket for hver
Time, deres Afvigelse fra Døgnets Middeltal og de efter
Formelen beregnede Afvigelser fra samme. Positivt Fortegn
udeladt.
is inappreciable compared to the accuracy with which the
hour of a meteorological observation can be regulated.
The compensation for the change in longitude is, practically
speaking, perfect.
In the following Table, I have set forth the mean
values of the pressure for every hour, reduced with the
corrections given above, as also their difference from the
mean value for the twenty-four hours, and the differences
from the latter computed by the formula. Positive signs
omitted.
a. m.
Klokkeslet ih 2’’ $h 4’’ 5’’ 6’’ 7’’ 8’’ g’’ 10’’ iih 12’’ Hour.
Corr. Obs.media 752.95 52.82 52.75 52.77 52.86 53.00 53.01 53.11 53.14 53.23 53.21 53.30 Corr. obs. means.
Afv. fraDagsmedium — 0.11—0.24—0.31—0.29—0.20—0.06—0.05 0.05 0.08 0.17 0.15 o. 2 4 Diff. from daily mean.
Beregnet Afvigelse—0.15—0.24—0.30—0.28 –0.21 — o.io—0.01 0.04 0.08 0.12 0.18 0.2 4 Computed difference.
Forskjel: Obs. — Ber. 0.04 0.00—o.01—001 o.01 0.04—0.04 0.01 0.00 0.05—0.03 0.00 Diff.: obs. — comp.
p. m.
Corr. Obs.media 753.37 53.34 53^8 53.21 53.10 53.06 52.99 52.99 53.00 53.04 53.05 52.99 Corr. obs. means.
Afv. fraDagsmedium 0.31 0.28 0.22 0.15 0.04 0.00—0.07—0.07—0.06—0.02—o.01—o. 11 Diff.from daily mean.
Beregnet Afvigelse 0.28 0.28 0.22 0.14 0.05—0.02—0.07—0.08—0.06 —0.03 — 0.03—0.07 Computed difference.
Forskjel: Obs. — Ber. 0.03 0.00 0.00 o.01—o.01 0.02 0.00 0.01 0.00 o.01 0.02—0.04 Diff.: obs. — comp.
Formel (Formula): bt = 753."’"06 -0.""214 sin (65° 48’.8 + t) + 0.—079 sin (108° 21’ + 2t)
+ 0~"061 sin (141° 27’ + St) + 0.""015 sin (58° 2(5’ + 41’).
Figuren Pl. I, Lufttryk 1876, viser, at den beregnede
Curve slutter sig fortræffeligt til de observerede Værdier.
Middelafvigelsen (MF), Summen af (Obs. — Ber.): 24, er
+ 0.n’"016.
Efter Formelen er beregnet:
1 Maximum: + 0.""287. l’’ 22" p.m.
2 „ — 0.mm025, 10* 37" p.m.
Medium indtræffer: T’ 13"’ a.m. og 5’’ 40m p.m.
Den hele Amplitude er altsaa: 0.",m589.
The ligure in PI. I, Pressure of the Air, 1876, shows
that the computed curve corresponds excellently with the
observed values. The mean deviation (MF), sum of (obs. —
comp.): 24, is + 0.mm0l6.
From the formula were computed
1 Minimum: — 0.""302, 3’’ 19" a.m.
2 „ — 0.""077. 7’* 47" p.m.
The Mean occurs: — 7A 13" a.m. and 5’’ 40’" p.m.
Hence, the Total Range is 0.—589.
1877.
1877.
Følgende hele Observationsdage ere anvendte:
Juni 16 til Juni 22, 7 Dage. Rejsen udenfor Helgelands
Kyst.
Juni 29 „ Juni 30, 2 „ „ „ Lofoten.
Juli 3 „ Juli 7, 5 „ „ fra Sortland til Tromsø.
Juli 16 „ Juli 19, 4 ,. nordenfor Tromsø.
Juli 25 „ Aug. 9, 16 „ „ til og fra Jan Mayen.
The following are the whole observation days: —
June 16 to June 22, 7 days; on the cruise off the coast of
Helgeland.
June 29 ,, June 30, 2.. „ „ „ off the Lofoten Islands.
July 3 ,. July 7, 5 „on the passage fromSortlandtoTrorasø.
July 16 „ July 19, 4 „ on the cruise north of Tromsø.
July 25 „ Aug. 9, 16 ,, on the passage to and from Jan Mayen.
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