til 1882 December), reducerede paa samme Maade som de 
ovenfor nævnte og til disses 16-aarige Række 1867 til 1882. 
Ved Godhed af Captein Hoftmeyer, 
danske meteorologiske Institut, erholdt jeg 
nedlige Barometerhøjder for Stykkisholm paa Island for 
Tidsrummet 1857 til 1877. Til disse føjedes, efter den 
danske meteorologiske Aarbog, Observationerne for 1878 til 
1880, saa at der for Stykkisholm forelaa Barometerhøjder 
for den 24-aarige Række 1857 til 1880. 
Bestyrer af det 
de midlere maa- 
Efter den danske meteorologiske Aarbog beregnedes 
Middelbarometerhøjden for de islandske Stationer Akureyri 
paa Nordkysten og Berufjord paa Østkysten samt for Thors- 
havn paa Færøerne for Aarrekken 1874 til 1880. Disse 
T-aarige Rækker reduceredes til Stykkisholms 24-aarige. For 
Thorshavns Vedkommende reduceredes ogsaa til Aalesunds 
16-aarige Række, og toges Middel af begge Resultater. 
For 3 Stationer i Danmark, Skagen, Fano og Kjø- 
benhavn, toges Middelbarometerstanden af det danske me- 
teorologiske Instituts Publicationer (Aarbog og Danmarks 
Klima). 
De danske Observationer ere reducerede til Normal- 
barometret 1 Kjøbenhavn, der stemmer overens med Nor- 
malbarometrene 1 St. Petersburg og Kew. 
De normale Barometerhojder for Skotland og de skotske 
Øer ere tagne efter Buchans Afhandling i Journal of the 
Scottish Meteorological Society No. LVIV. 
cerede til .Normalbarometret i Kew. på 
Fra Spidsbergen haves et Aars Observationer fra 
Nordenskiölds Overvintring 1 Mosselbay (A. Wijkander: 
De ere redu- 
Observations météorologiques de Vexpédition arctique sue- 
doise 1872—73) og fra Smiths Observatorium 1 Isfjorden 
(N. Ekholm: l’expédition suédoise au Spitzberg 1882—1883). 
Det svenske Normalbarometer 1 Stockholm 
mende med det 1 St. Petersburg. 
er overenstem- 
Fra Øst-Grønland har jeg benyttet Observationerne 
fra den anden tyske Nord-Polar-Expedition, der overvin- 
trede ved Sabine-Øen 1869 til 70. (Zweite deutsche Nord- 
fahrt II. Kk. Koldewey, 4, Luftdruck). 
For Jan Mayen har jeg benyttet Observationerne fra 
den østerrigske Polar-Station 1882—83. (KE. v. Wohlge- 
muth: Bericht ete.). 
For Npidsbergen, Øst-Grønland og 
jeg kun benyttet Aarsmedierne. 
Jan Mayen har 
Til Fuldstændiggjørelse af Kartet over det normale 
Lufttryk har jeg medtaget samtlige norske Barometerhøjder 
samt nogle svenske Stationer (Hamberg: Månadsöfversigt 
af Viderleken i Sverige) og nogle russiske (Wild: Ueber 
die Beziehungen zwischen Isobaren und Isanomalen der 
Temperatur). 
For at finde den normale Barometerstand paa Havet 
har jeg benyttet Hoffmeyers synoptiske Karter, der for hver 
Dag Kl. 8 Morgen fra September 1873 til November 1876 
give Barometerhøjdernes Fordeling over Nordhavet. 
110 
Alten (1871 April to 1882 December), reduced in the same 
manner as stated above, and likewise to the sixteen-years 
series 1867—1882. 
By the courtesy of Capt. Hoffmeyer, Director of the 
Danish Meteorological Institute, I obtained the mean monthly 
heights of the barometer at Stykkisholm, Iceland, for the 
period 1857 to 1877. To these were added, from “Dansk 
meteorologisk Aarbog,” the observations for 1878 to 1880; 
and hence I had for Stykkisholm observations of the ba- 
rometer for the twenty-four-years series, viz., from 1857 
til 1580. 
From “Dansk meteorologisk Aarbog” was computed 
the mean height of the barometer for the Icelandic Stations: — 
Akureyri, on the north coast, and Berufjord on the east, 
as also for Thorshavn, on the Færoes, for the years rang- 
ing from 1874 to 1880. This seven-years series was reduced 
to Stykkisholm's twenty-four-years series. As regards Thors- 
havn, the reduction was also made to Aalesund’s sixteen- 
years series, and a mean taken of the both results. 
For 3 Stations in Denmark, viz., Skagen (the Scaw), 
Fano, and Copenhagen, the mean height of the barometer 
was taken from the Publications of the Danish Meteoro- 
logical Institute (*Aarbog” and “Danmarks Klima”). 
The Danish observations have been reduced to the 
Standard-Barometer of Copenhagen, which agrees with the 
Standard-Barometers of St. Petersburgh and Kew. 
The normal heights of the barometer for Scotland and 
the Scottish Isles have been taken from Buchan's Memoir in 
“Journal of the Scottish Meteorological Society,” No. LVIV. 
They are reduced to the Standard-Barometer of Kew. 
For Spitzbergen we have a year’s observations, from 
Nordenskiéld’s wintering in Mossel Bay (A. Wijkander: 
Obseryations météorologiques de lexpédition arctique suédoise ~ 
1872—1873), and from Smith’s Observatory in Ice Sound 
(N. Ekholm: L’expédition suédoise au Spitzberg 1882— 1883). 
The Swedish Standard-Barometer in Stockholm agrees with 
that of St. Petersburgh. 
For East Greenland, I have made use of the observa- 
tions taken on the Second German North-Polar Expedition, 
that wintered on Sabine Island 1869—1870 (Zweite 
Deutsche Nordfahrt IT. K. Koldewey, 4, Luftdruck). 
For Jan Mayen, I have applied the observations from 
the Austrian Polar Station 1882—1883 (E. v. Wohlgemuth: 
Bericht etc.) 
For Spitzbergen, Hast Greenland, and Jan Mayen, I 
have applied only the annual mean. 
To complete the map showing the normal atmospheric 
pressure I took all the Norwegian barometric observa- 
tions, as. also those from a few Swedish Stations (Ham- 
berg: Månadsöfversigt af Viiderleken i Sverige), and a few 
Russian (Wild: Ueber die Beziehungen zwischen Isobaren 
und Isanomalen der Temperatur). 
With the object of finding the normal height of the 
barometer at sea, I have employed Hoffmeyer's Synoptical 
Charts, that give for every day — 8 a. m. — from September 
1873 to November 1876, the distribution of the height of 
the barometer over the North Ocean. 
