100 
I den følgende Redegjørelse er hvert af de meteoro- 
logiske Elementer behandlede for sig, i Ordenen: Luftens 
Tryk, Luttens Temperatur, Vanddampenes Tryk, Relativ 
Fugtighed, Vindens Hastighed og Havtladens Temperatur. 
I. Lufttryk. 
1876. 
- Følgende hele Observationsdage ere anvendte: 
Juni 28 til Juli 8, 11 Dage. Rejsen fra Christiansund til 
Færøerne (Thorshavn). 
Juli 17 til Juli 26, 10 Dage.  Rejsen fra Færøerne til 
Island (Reykjavik). 
Aug. 4 til Aug. 13, 10 Dage. Rejsen fra Island til Norge 
(Halten). 
Disse Dage repræsentere et meget uroligt Vejr, med 
sterk Vind, høj Sø og tyk Luft paa Havet mellem Island 
og Norge, mellem Bredderne 62° og 659. Antallet af Dage 
er tilsammen 31. 
Den (on the) 27 Juni (of June), 12 p.m. 
Å 8 Juli (of July), E a 
In the following account each of the meteorological 
elements has been treated separately, in the order: — 
Pressure of air, temperature of air, force of vapour, relative 
humidity, velocity of wind, and temperature of sea-surface. 
I. Pressure of the Air. 
1876. 
The following is the number of whole observation days: — 
June 28 to July 8, 11 days; on the passage from Christian- 
sund to the Færoes (Thorshavn). 
July 17 to July 26, 10 days; on the passage from the 
Færoes to Iceland (Reykjavik). 
Aug. 4 to Aug. 13, 10 days; on the passage from Iceland 
to Norway (Halten). 
On these days the Expedition encountered very boisterous 
weather, with high winds, a rough sea, and a foggy atmo- 
sphere, throughout the tract of ocean between Iceland and 
Norway, in latitude 62° to 65". The total number of days 
was dl. 
var Lufttrykket (the pressure was) 758.""7, 
‘3 TaO 7s, 
— Forskjel (Difference) 
Den (on the) 16 Juli (of July), 12 p.m. 
26 
oy) 
? 
1 
var Lutttrykket (the pressure was) 
br) 
tn 
f 1 
mm ‘ ll ]OzL72 = e 
760.3, 
TAT mm] : 
-— Forskjel (Difference) 
Den (on the) 3 August, 12 p.m. 
: 13 5 
Forskjel (Difference) 
Correctionen for den hele Gruppe = (7.9 + 13.2 — 14.3): 
31=6.8:31 =0.""219 eller pr. Time, regnet fra Middag 
= (NAG) 2 2 = (02740101), 
Fejlen i Observationsklokkeslettet Kl. 12 Middag, 
hidrørende fra Længdeforahdring at Fartøjet, er størst den 
dte August, da den gaar op til + 27”, næststørst den 22de 
Juli, da den er —20.”5. Dette er i begge Tilfælder under 
Sejladsen langs Islands Sydkyst. Summen af positive Fejl 
er 149.”5, fordelt paa 14 Dage, eller pr. Dag 10.”7. Sum- 
men af negative Fejl er — 142.”8, fordelt paa 15 Dage, 
eller pr. Dag —9.”5. Den algebraiske Sum, 6.”7, fordelt 
paa 31 Dage, giver for Middagsobservationen en gjennem- 
snitlig Fejl i Klokkeslettet efter sand Soltid + 0.”22, det 
er Klokken er paa Stedet 13 Secunder mere end antaget 
efter Skibsuret. Denne Afvigelse er forsvindende i Forhold 
til den Nøjagtighed, hvormed Tiden for en meteorologisk 
1 Wild op. cit. Side 9. 
var Lutttrykket (the pressure was) 
13.2: 10 = 1.82 =e. 
749,05, 
763.78, 
1A m3 - 10 = — 1.7948 =. 
The correction for the whole group = (7.9 + 13.2 — 
14.3): 31 = 6.8:31 =0.""219, or, per hour, taken from noon, 
= AIG) 3 Å = OsFX00Q), 
The error in the hour of observation at noon, occa- 
sioned by the change im the longitude of the vessel, was 
greatest on the 5th of August, when it reached + 27”; 
the next greatest error occurring on the 22nd of July, 
when it was — 20."5. Both of these cases occurred when the 
Expedition was steaming along the south coast of Iceland. 
The sum of the positive errors is 149.”5, distributed over 
14 days, or 10.”7 per day. The sum of the negative errors 
amounts to — 142.”8, distributed over 15 days. or — 9.”5 
per day. The algebraic sum, 6.”7, distributed over 31 days, 
gives for the midday observation an average error in the 
hour by appareut solar time of + 0."22, 1. e. local time 
13 seconds in advance of the ships clock. This difference 
1 
Wald! op. cit. p. 9. 
