12 



Den følgende Dag. Iste August, tik jeg om Formid- 

 dagen nogle Solhøjder fra Ankerpladsen. Vi lettede og 

 stod sydover, loddede og skrabede paa 7u og 95 Favnes 

 Dyb (se Kartet). , Bunden var sort vulkansk Sand og Slik 

 og Dyrelivet rigt: Våndet ved Bunden bavde en Tempe- 

 ratur under 0°. Over Jan Mayens Svelland laa Taagefl 

 fremdeles og skjulte de øverste Dele, men over Nordlandet 

 spredte Skyerne sig efterbaanden, saa at vi bele Etter- 

 middagen og Aftenen bavde det herlige Syn af Beerenberg 

 i fuld Solbelysning. Selvfølgelig vare alle Tegnere i fuld 

 Virksomhed. Fra den nordligste af de paa Kartet med 95 

 Favnes Byb betegnede Stationer tog jeg en Række Maalin- 

 ger af Beerenberg: Horizontal vinkler og Højdevinkler med 

 Sextant, Heldningsvinkler med det til mit geologiske Com- 

 pas borende Klinometer. samt tiere Skitser. Dette Material 

 er benyttet til Tegningen af mit Billede af Beerenberg. 



Til Venstre ser man den sorte Ægø i lidt over 6 

 Kvartmils Afstand, det nærmeste Object. Havborizonten 

 ligger i lidt over -i Kvartmils Afstand fra Øjet, og alle 

 Strandpartierne dukke følgelig under denne. Til Højre for 

 Ægøen sees Kraterne Esk og Vogt, begge med sine kløf- 

 tede Kraterrender. Mellem Krater Vogt og det spidsere 

 Fjeld (Scoresby's Berg) til venstre for samme, der ligger 

 lige op for. Østkanten af Ægøen. synes en Dal med en 

 Bergmasse. der skraaner mod Vest og hvis Fod var synlig 

 fra Ankerpladsen. maaske en Lavastrøm. Dens Farve var- 

 mere blaalig, medens Kraternes er rødlig. Østenfor Krater 

 Vogt saaes, mindre tydelig, nogle Hojder under Beerenbergs 

 Fod, indtil man kommer til den store Sydbræ, der i en 

 Bue gaar ned fra Snegrændsen til Havet. Partiet mellem 

 Sydbræen og Sydostkap frembød i den betydelige Afstand, 

 9 til 12 Kvartmil, ikke mange Detaljer. Lige øst for Syd- 

 bræen kunde jeg se en Højde eller en Højderyg, der syn- 

 tes at ende i et Fremspring i Havet. Scoresby*s Cape Fisb- 

 burn. Som man ser af Billedet, kunde Snegrændsens 

 gjennemsnitlige Beliggenbed bestemmes med en ikke ringe 

 Nøjagtighed. Dens Højde beregner jeg efter mine Maalin- 

 ger til 7o() Meter over Havet. Over Snegrændsen sees 

 Beerenbergs Snekaabe, der dækker bele den øvre Del af 

 Fjeldets Basis. Denne Basis ev en rlad Kegle ; dens Skraa- 

 ning maaltes paa Vestsiden til 8" og paa Østsiden, ned 

 mod Sydostkap. til 10°. • 



Over Basiskeglen. der rækker .op til en Højde af c. 

 1400 Meter, hæver sig Beerenbergs Askekegle med en 

 ydre Skraaning af 42°. Denne fremtræder ren .paa Vest- 

 siden, medens der paa Østsiden skyder frem fra. Keglen 

 nogle Ribber, antagelig Lavagange gjennem Keglen, der 

 reducere den apparente Skraaning til 32°. Paa Vestsiden 

 maaltes. fra den 8° heldende Hasis af, et længere Stykke 

 med 15° Heldning, derpaa et kortere Stykke med 28° 



On the following day. August tbe Ist. I took in the 

 forenoon a few solar altitudes from the ancborage. We 

 tben got under weigh and stood south, sounding and dredg- 

 ing in 70 and 95 fathoms (see Map). Tbe bottom con- 

 sisted of black volcanic sand and ooze; and there was 

 abundance of animal lite. Tbe bottom-temperature was 

 below 0°. Over tbe soutbern part of Jan Mayen the fog 

 still lay heavy, obscuring tbe most elevated tracts; but over 

 tbe nortbern part the clouds were gradually dispersing, and 

 throughout the afternoon and evening we had a magni- 

 tieent sun-lit view of Beei'enberg. All who could draw 

 were now of course fully engaged in sketching the scenery. 

 From the most northerly of the observing-stations at wbich 

 tbe depth. as indicated in tbe Map, was 95 fathoms, I 

 took a series of measurements of Mount Beerenberg, - 

 horizontal and vertical angles, with the sextant, angles of 

 iuclination. with the clinometer belonging to my geological 

 compass, and made besides several sketcbes. The material 

 thus acquired has been carefully worked up for my pros- 

 pect of Mount Beerenberg. 



On the left-hand side. distant upwards of 6 miles, 

 tbe black wall of Egg Island, tbe nearest object in the 

 picture, is seen boldly projecting. The distance of the 

 horizon being a little more than 4 miles from the point 

 of view, all parts of the shore dip beneath it. To the 

 right of Egg Island are seen the Esk and Vogt craters, 

 with their jagged edges. Between Vogfs erater and 

 the somewhat acuminate mountain to the lett (Mount 

 Scoresby) rising behind the eastern acclivity of Egg Is- 

 land, extends a valley filled with a rocky mass, — .pos- 

 sibly a current of lava, - - the base of which was visible 

 from the ancborage. This mass had a bluish tint, whereas 

 the craters are of a reddish colour. East of Vogfs erater 

 loomed a few summits at the foot of Mount Beerenberg, 

 and farther on was seen the great southern glacier shelving 

 down in a curve from the snow-limit to the sea. At so 

 considerable a distance as 9 to 12 miles, the tract between 

 the soutbern glacier and Cape South-East did not present 

 many prominent details. East of the southern glacier. I 

 could distinguish a summit or mountain-ridge terminating 

 apparently in a headland, — Scoresby "s Cape Fishburn. 

 As will be seen from the plate, the snow-lilie could be 

 determined with very considerable accuracy. Its elevation 

 I computed from my measurements at 2316 feet above the 

 sea. At that height commence the snows of Beerenberg, 

 which cover tbe entire upper portion of the base of the 

 mountain. The base has the form of an obtuse cone, that 

 on the west side was found to incline 8°, on the east, 

 towards Cape South-East. Ut". 



Above the lower cone. which attains an altitude of 

 nearly 4(><Kt feet. towers the cone- of ashes, with its outer 

 slope shelving at an angle of 42°. On the west side the 

 slope has the surface smooth, but on the east exhibits a 

 few prominent ribs, probably dykes of lava, wbich reduce 

 the apparent incline to 32". On the west side, fromwheré 

 the base of the mountain shelves at an angle of 8°, the 

 slope for a good way up was found to be 15°, then for a 



