Lodskud. 
mest characteriserende anforte 1 Kartet. 
Som man ser, ere Lodskuddene ingenlunde jevnt for- 
delte over Havet. De findes tættest ved Kysterne, paa 
Kystbankerne og langs de af Expeditionerne udsejlede Li- 
nier. Mellem disse Linier staar der større tomme Rum. 
Som en Følge af denne Ujevnhed i Lodskuddenes Fordeling 
lader Havbundens Topografi sig ikke paa alle Steder frem- 
stille med Sikkerhed. — Bedst bestemte ere 
Kystbankerne og Bundens Skraaning mod Dybet paa den 
østlige Side af dette, fra Nordsøen til Nord-Spidsbergen, 
Øst-Havet, Strækningen fra Shetland over Færøerne og 
Island til Danmarkstrædet, Bankerne omkring disse Øer, 
Bankerne og Skraaningen mod Dybet udenfor Øst-Grønland 
fra den 70. til den 75. Breddegrad. Ganske godt bestemte 
ere ogsaa de to Maximaldybder paa over 2000 Favne. 
Paa alle disse Strækninger lade Isobatherne sig drage efter 
Dybdetallene uden Tvetydighed. 
Hvor Lodskuddene ligge meget tæt, ere kun de 
den samme 
Men der er andre Strækninger, hvor de forhaanden- 
værende Lodskud tillade forskjellige Tydninger af Havbun- 
dens Form, nemlig: 
a) Strækningen mellem Island, Færøerne 
Banken; her mangle Lodninger paa de dybere Partier. 
Elisabeth-Banken, der paa tidligere Karter findes af- 
og 
lagt søndenfor Island, har jeg ikke taget med, da dens 
Existence er yderst tvivlsom, idet den forgjæves har 
været eftersøgt af danske Krigsskibe i de senere Aar. 
b) Vestsiden af Danmark-Strædet, hvor selve Kystens 
Form endnu er ubekjendt. 
c) Strækningen mellem Jan Mayen og Island. Det er 
sikkert, at vi her have en Rende med over 1000 Fay- 
nes Dyb, mentRetningen af denne Rendes dybere Par- 
Kartets 
Isobather her ere trukne efter de Vink, som Studiet 
af Temperaturens Fordeling i Dybet har givet mig. 
Skraaningerne paa begge Sider af Renden kunne ved 
nøjere Undersøgelser komme til at se anderledes ud. 
Lodskuddet 700 Fayne søndenfor Jan Mayen hid- 
rører fra *Hansa” og maa ansees paalideligt, da der 
blev taget Bundprøve med Loddet. ~Linien for 100 
Favne er trukket efter Scoresby’s Opgave, at der 
i en Afstand af 11 til 12 leagues i SSE for Sydkap 
findes - Ankergrund paa 35 til 36 Favne Vand. I 
Sydost for Jan Mayen turde den stejle Skraaning mod 
Dybet blive moditiceret ved nye Lodninger. 
tier lader sig ikke angive med Sikkerhed. 
Tegningen af den store Indbugtning i 1300 Favnes 
Dyb nordenfor Jan Mayen er mig noget problematisk. 
Lodskud mangle. Desværre hindrede Isen os fra at 
komme hid, saaledes som det laa i min Plan. 
e) Mellem Jan Mayen og Beeren-Eiland løfter sig aaben- 
bart en undersøisk Ryg. Men om den er ganske 
Rockall- 
| 
r {I 
| 
made use of. Where the soundings lie very close together, 
the most characteristic only have been set down on the chart. 
As will be seen, the soundings are far from equably 
distributed throughout the sea. They occur closest in the 
vicinity of the coasts, on the coastal banks, and along the 
lines forming the track of the Expedition. Between these 
lines, extend the larger unnoccupied spaces. Owing to 
this unequal distribution of the soundings, the topography 
of the sea-bed cannot be everywhere represented with equal 
certainty. The best-defined portions are the coastal banks, 
and the slope of the bottom towards the deep on the 
eastern side of the latter from the North Sea to North 
Spitzbergen, likewise the Barents Sea, the tract stretching from 
Shetland past the Færoes and Iceland to Denmark Strait, 
the banks surrounding those islands, and the banks and 
decline towards the deep off Hast Greenland, from thé 70th 
to the 75th parallel of latitude. Well defined also are the 
two maximum-depths, each exceeding 2000 fathoms. Through 
all these tracts of ocean, isobaths admit of being drawn 
from the figures of depth, without ambiguity. 
But there are other tracts, in which the soundings 
taken will allow of a different explanation being given to 
the form of the sea-bed, viz.: — ; 
a) The tract between Iceland, the Færoes, and the Rock- 
all Bank; here we have no soundings in the deeper 
The Elizabeth Bank, placed on older charts 
of Iceland, I have not set down, its existence 
parts. 
south 
being very doubtful, Danish men-of-war having of late 
years sought in vain to find it. ; 
The west side of Denmark Strait, where the contours 
even of the coast are still unknown. 
The tract between Jan Mayen and Iceland. It 
evident that we have here a channel more than 1000 
IS 
fathoms deep; but the direction of the deeper parts 
The isobaths on the 
chart have been the 
by a study of the distribution of the temperature m 
the deep strata. The slopes on either side of the 
channel will, perhaps, after a closer examination, be 
found to have a different appearance. The sounding 
located 700 fathoms south of Jan Mayen, was taken 
on board the “Hansa,” and may be considered reli- 
able, a sample of the bottom having been brought up 
with the lead. The hundred-fathom line has been drawn 
according to Scoresby’s statement, viz., that at a distance 
of 11 or 12 leagues SSE from South Cape there is 
anchorage in 35 or 36 fathoms of water. South-east 
of Jan Mayen, the abrupt slope towards the deep will 
possibly have to be modified after subsequent soundings. 
The figure of the large submarine bay, at a depth of 
1800 fathoms, north of Jan Mayen, appears to me 
somewhat problematical. Soundings there are none. 
Unfortunately, ice prevented us from reaching up to 
that locality, as I had purposed according to my orig- 
inal plan. 
Between Jan Mayen and Beeren FEiland rises man- 
ifestly a submarine ridge. But whether this ridge 
cannot be given with certainty. 
drawn from results attained 
d) 
e) 
