De Observationer, jeg har benyttet til Kartet for Au- 
gust, hidrøre dels fra norske Skibe, navnlig Arkhangelskfarere 
og Nordsøfarere, dels fra følgende videnskabelige Expeditioner, 
Fangstfarter eller Orlogstogter. Gaimard, *La Recherche”, 
1838 og 1839 Nordsøen-Spidsbergen, 1840 Island-Hammer- 
fest-Arkhangelsk. Lord Dufferin, 1856, Island-Jan Mayen- 
Hammerfest-Spidsbergen. —Koldewey. “Germania” 1868, 
Grønlandshavet, Østhavet. Nordenskiöld og Palander, “Sofia” 
1868, Gronlandshavet og Østhavet. Dorst, *Bienenkorb” 
1869, Grønlandshavet. Bessels, *Albert” 1869, Østhavet. 
Koldewey, “Germania” 1869 og 1870, Nordsøen-Jan Mayen- 
Grønland. Lamont, “Diana” 1871, Grønlandshavet. Wey- 
precht, “Isbjorn” 1871, Østhavet. Tobiesen, *Freia” 1871, 
Østhavet. Melsom, *Germania” 1871, Østhavet. Den norske 
Nordhavs-Expedition, * Vøringen”, 1876 Norge-Island, 1877 
Norge-Jan Mayen, 1878 Spidsbergen, Grønlandshavet. Nor- 
denskiöld og Palander, “Vega” 1878, Østhavet. Fylla” 
1877 og 1878, Island. *Ingolf” 1879, Island og Danmark- 
strædet. *W. Barents” 1878 og 1879, Østhavet. Norden- 
skiöld, “Sofia” 1883, Danmarkstrædet. Sorensen, * William” 
1885, Island-Norge. Admiral Irminger, Tidsskrift for Sø- 
væsen 1861, PI. I, flere danske Orlogstogter, Øst-Island- 
Færøerne. 
Foruden Observationer fra August har jeg ogsaa be- 
nyttet saadanne for Juli og for September og har*reduceret 
samtlige til Midten af August paa følgende Maade. For 
Stationerne Fruholm og Jan Mayen optegnedes Curven 
for Temperaturens aarlige Gang efter Maanedsmedia, og 
Curven for den sidste Station, der var mindre regelmæssig, 
udjevnedes paa grafisk Vej. Efter disse Curver fandtes 
følgende Afvigelser mellem Temperaturen den 15. August 
og de respective Dage. 
DY 
4 
The observations I have made use of for the August 
Map, are derived in part from Norwegian merchant vessels, 
chiefly those trading on Archangel and those navigating 
the North Sea, and in part from the following scientific 
Expeditions, as also from sealers or from men of war, viz: — 
Gaimard, “La Recherche,” 1838 and 1839 North Sea-Spitz- 
bergen, 1840 Iceland-Hammerfest-Archangel; Lord Dufferin, 
1856, Iceland-Jan Mayen-Hammerfest-Spitzbergen; Kolde- 
wey, “Germania,” 1868, Greenland Sea, Barents Sea; Nor- 
denskiöld and Palander, “Sofia,” 1868, Greenland Sea and 
Barents Sea; Dorst, “Bienenkorb,” 1869, Greenland Sea; 
Bessels, “Albert,” 1869, Barents Sea; Koldewey, “Germania,” 
1869 and 1870, North Sea-Jan Mayen-Greenland; Lamont, 
“Diana,” 1871, Greenland Sea; Weyprecht, “Isbjorn,” 1871, 
Barents Sea; Tobiesen, *Freia,” 1871, Barents Sea; Mel- 
som, “Germania,” 1871, Barents Sea; The Norwegian 
North-Atlantic Expedition, “Voringen,” 1876, Norway-Ice- 
land, 1877, Norway-Jan Mayen, 1878, Spitzbergen, Green- 
land Sea; Nordenskiöld and Palander, “Vega,” 1878, 
Barents Sea; “Fylla,” 1877 and 1878, Iceland; “Ingolf,” 
1879, Iceland and Denmark Strait; “W. Barents,” 1878 
and 1879, Barents Sea; Nordenskiöld, *Sofia,” 1883, Den- 
mark Strait; Sorensen, “William,” 1885, Iceland-Norway; 
Admiral Irminger, Tidsskrift for Søvæsen, 1861, Pl. I, 
several Danish men-of-war cruises, East [celand-Færoes. 
Besides observations in August, I have also made use 
of other such, taken in July and in September, reducing them 
all to the middle of August, in the following manner. For 
the Stations Fruholm and Jan Mayen, I constructed a curve 
showing the annual variation of temperature by monthly 
means, the observations for the latter Station, which did 
not show so regular a course, having been smoothed off by 
a freehand curve. From these curves were found the 
following differences between the temperature on the 15th 
of August and the days heading the columns of the Table. 
Juli (July) I 5 IO I5 20 28 30 
Fruholm 1.8 19.2 0°.9 0°.6 0.4 00.3 05 
Jan Mayen Tee I .4 it olf 0.8 0.6 0.4 2 
Middel (Mean) 1.6 It og I .0 0.7 0.5 0.4 0.2 
August 5 10 TE 20 25 30 
Fruholm © of 0.0 0.0 0.0 0.1 2 
Jan Mayen O.1 0.0 0.0 0.0 O.I 2 
Middel (Mean) 0.1 0.0 0.0 0.0 © of op 
September 5 10 15 20 25 30 
Fruholm 0.4 0.5 0.7 I .0 Ie 17 oG 
Jan Mayen 0.4 0.7 0.9 I .0 08} TG 
Middel (Mean) 0.4 0.6 0.8 1.0 Te) TG 
Af de som Middel anførte Tal for hver femte Dag From the figures given as means for every 5th day, I 
construeredes ved Interpolation en Tabel, der for hver Dag 
fra 1. Juli til 30. September giver den Størrelse, der, 
tillagt en paa den tilsvarende Dag gjort Observation, redu- 
cerer denne til den 15. August. 
De saaledes reducerede Observationer afsattes paa en 
Række Karter. For Grønlandshavets og det norske Hays 
constructed, by interpolation, a Table, which, for every day 
from the Ist of July to the 30th of September, indicates the 
quantity that, added to any observation taken on the day 
corresponding, reduces the latter to the 15th of August. 
The observations thus reduced were set down on a 
With regard to the Greenland Sea and 
13% 
series of maps. 
