1878. 8 am. 
Tromsø — 0.07” 
Gjesvær — 0.32 
Vardø — 0.04 
2 p.m. 8 p.m. 
m -- O. I I mm = DOA ie, 
+024 -+ 0.07. 
+ 0.05 —0.02. 
Middel (Mean) — 0.14 
Expedition 1878 — 0.25 
Kysten og Expeditionen have fremdeles begge Minimum | 
om Morgenen og Maximum om Eftermiddagen. 
| 
Tages Middeltallet for alle 3 Aar, faar man: 
Norske Kyststationer — 0.187” ++ 0.147" 
Expeditionen — 0.17 +0.17 
Altsaa en særdeles nær Overensstemmelse. Denne | 
Undersøgelse viser saaledes, at de ombord paa Expedi- | 
tionen gjorte Barometeriagttagelser have ledet til en daglig 
Periode for Lufttrykkets Forandring, der har en reel Be- 
tydning: den stemmer overens med det samme Fænomens | 
daglige Forandring paa Stationerne paa Kysten. | 
Dernæst har jeg undersøgt, hvorvidt den daglige For- 
andring af Lufttrykket paa Kysten rundt det norske Hav, 
som er iagttaget 1 de tre Sommere, da Expeditionen arbej- | 
dede i Søen, er overensstemmende med den, der fremgaar 
af en længere Observationsrekke. Følgende Tabel, der | 
er beregnet paa samme Maade som den ovenfor givne, | 
viser Resultatet. 
Norske Kyst-Stationer. Aar (Year). 
(Norw. Coast-Stations). 
Vardø 13 1868—80 
Tromsø 10 68—81 
Bodø 13 68—380 
Brønø 12 69—80 
Christiansund 20 61—80 
Florø I I 60—80 
Bergen 20 61—80 
Skudesnes 20 61—80 
Mandal 20 61—80 
+ 0.13 0.00. 
+019 + 0.07. 
Both the coast-stations and the Expedition have still 
the minimum in the morning and the maximum in the 
afternoon. 
If we take the mean of the 3 years, we get — 
+ 0.037". Norwegian Coast-Stations. 
0.00. Expedition. 
Accordingly a very close agreement. This investiga- 
tion shows, therefore, that, from the barometrical obserya- 
tions taken at sea on the Expedition has been educed a 
diurnal period for the pressure of the air, to which a real 
value may be attached: it corresponds with the diurnal 
variation in the same phenomenon at the stations on the 
coast. 
I next investigated whether the diurnal variation in 
the pressure on the coast of the Norwegian Sea observed 
on the three summer eruises of the Expedition, corresponds 
with that resulting from a longer series of observations. 
The following Table, computed in the same manner as 
that given above, shows the result. 
Middel af Juni, Juli og August. 
(Mean for June, July, and August). 
8 a.m. 2 p.m. 8 p.m. 
== Opi 8 mm -+ 0.06 — 0.12 mm. 
— 0.06 + 0.02 + 0.05 
— 0.10 + 0.05 -+ 0.04 
— 0.06 —-+- 0.08 — 0.03 
— o. 1 1 + 0.02 + 0.09 
— 0.10 +- 0.09 0.00 
— O. I I + 0.05 + 0.07, 
— 0.13 + 0.08 + 0.05 
— 0.06 -+ 0.09 — 0.04 
Middel (Mean) 
Færøerne og Islands Østkyst. 
(The Færoe Islands and East Coast of Iceland) Aar 
— 0.10 a 0.06 —+ 0.04 a 
( Year) 8 a.m. 2 p.m. 9 p.m. 
Thorshayn 6 1874—79 — o.12”” OOO Se One « 
Berutjord 6 74—79 —0.20 — 0.03 + 0.24 
Middel (Mean) — 0.16 — 0.02 + 0.18 
