extends over to the bank south of Ireland, while the three stations
of the western part lie in the deep sea west of the Porcupine Bank.

[Fig. 2 and caption: Fig. 2. -- The "Fram's" Route from June 20
to July 7, 1910 (given in an unbroken line -- the figures denote
the stations).

The dotted line gives the Frithjof's route, and the squares give five
of the Michael Sars's stations.]

In both parts of this section there are, as shown in Fig. 3, two great
volumes of water, from the surface down to depths greater than 500
metres, which have salinities between 35.4 and 35.5 per mille. They
have also comparatively high temperatures; the isotherm for 10deg.
C. goes down to a depth of about 500 metres in both these parts.

It is obvious that both these comparatively salt and warm volumes
of water belong to the Gulf Stream. The more westerly of them, at
Stations 11 and 12, and in part 13, in the deep sea to the west of
the Porcupine Bank, is probably in motion towards the north-east
along the outside of this bank and then into Rockall Channel --
between Rockall Bank and the bank to the west of the

[Fig. 3 and caption: Fig. 3. -- Temperature and Salinity in the
"Fram's" Southern Section, June, 1910.]

British Isles -- where a corresponding volume of water, with a somewhat
lower salinity, is found again in the section which was taken a few
weeks later by the Frithjof from Ireland to the west-north-west
across the Rockall Bank. This volume of water has a special interest