Tagttagelse kan afpasses. Compensationen for Længdefor- 
andring 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 
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 
udeladt. from the latter computed by the formula. Positive signs 
omitted. 
a.m. 
Klokkeslet 182 ale 3 At gå 6" we 8” 9” ot put nae Hour. 
Corr. Obs.media 75205 G2032 B27 SAGT S280 5900 KROU GRoll Fan GRAB Feu Sao 0055 Oos menns, 
Afv. fra Dagsmedium —o0.11 —0.24 —0.31 —0.29 —0.20 —0.06—0.05 0.05 0.08 0.17 0.15 0.24 Diff.from daily mean. 
Beregnet Afvigelse —o0.15 —0.24 —0.30 —0.28 --0.21 —0.10 —0.01 0.04 0.08 0.12 0.18  0.24Computed difference. 
Forskjel: Obs. — Ber. 0.0 0.00 —0.01 —0 OI 0.01 0.04 —0.0 0.01 0.00 0.05 —0.03 0.00 Diff.: obs. — comp. 
J 4 + + 3 
p.m. 
Corr. Obs.media 753.37 53-34 53-28 53-21 53.10 53.06 52.99 52.99 53.00 53.04 53.05 52.99 Corr. obs. means. 
Atv.fraDagsmedium 0.31 0.28 0.22 0.15 0.0 0.00 —0.0 0.0 0.06 —0.02 —o.o1 —o.11 Diff.from daily mean. 
> 3 D 4 V 
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. 
8 8 4 5 
Forskjel: Obs. — Ber. 0.03 0.00 0.00 0.01 —0.0r 0.02 0.00 0.01 0.00 0.01 0.02 —0.04 Diff.: obs. — comp. 
3 
= o> 
Formel (Formula): b, = 753.”"06 -—0.”"214 sin (65° 48.8 + ¢) + 0.079 sin (108° 21" + 26) 
+ 0.061 sin (141927 + 3t) + 0.015 sin (58° 26’ + 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 
027016. ; 
Efter Formelen er beregnet: 
1 Maximum: + 0.”"287, 
2 ss RS O.mmO25, 
Medium indtreffer: 7 13” a.m. og 5” 40” p. 
Den hele Amplitude er altsaa: 0.""589. 
1877. 
Følgende hele Observationsdage ere anvendte: 
The figure in Pl. 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, 1s = 0.77016: 
From the formula were computed — 
I’ avi Foran, | Minmum: — 0.77302, 3” 19” a.m. 
Oe BI jos, 2 nf — 0.077, 7" 47” pun. 
m. The Mean occurs: — 7 13” am. and 5* 40” p.m. 
Hence, the Total Range is 0.””589. 
1877. 
The following are the whole observation days: — 
Juni 16 til Juni 22, 7 Dage. Rejsen udenfor Helgelands June 16 to June 22, "days; on the cruise off the coast of Helge- 
Kyst. land. 
Jum 28) . dium stl, 2 . ; »  Lofoten. | June29 , June30, 2. , off the Lofoten Islands. 
Juli 8 , Juli % 5 px, , fra Sortland til Tromsø. | July 3, July 7. 5, onthepassagetfromSortlandtoTromsø. 
Juli 18 ; du 19, £& % , nordentor Tromsø. | July 16 ,, July 19, 4,, on the cruise north, of Tromsø. 
Juli 25 . An G IG , til og fra Jan Mayen. July 25 ,, Aug. 9, 16 ,, on the passage to and from Jan Mayen. 
