The sea west of Spitsbergen; the oceanographic observations of the Isachsen Spitsbergen Expedition in 1910 . 100 or 200 shapes look very im-probable, and are entirelydifferent from those of othercurves, in a similarly warmpart of this current; and temperatures suchas C. in 500 metres at Stat. A 3, ° C. in 850 metres at Stat. A 4, and 850 metres at Stat. A 6, are highly improb-able in this region. They are much higherthan any temperatures hitherto observed insimilar depths of the Spitsbergen Atlantic Cur-rent. They also give impossible values of thedensity of t
The sea west of Spitsbergen; the oceanographic observations of the Isachsen Spitsbergen Expedition in 1910 . 100 or 200 shapes look very im-probable, and are entirelydifferent from those of othercurves, in a similarly warmpart of this current; and temperatures suchas C. in 500 metres at Stat. A 3, ° C. in 850 metres at Stat. A 4, and 850 metres at Stat. A 6, are highly improb-able in this region. They are much higherthan any temperatures hitherto observed insimilar depths of the Spitsbergen Atlantic Cur-rent. They also give impossible values of thedensity of the water in these depths. All tem-peratures were taken with a Pettersson Insula-ted Water-Bottle of the old model, in which a thermo-meter was inserted after the bottle came up. The in-sulation of this water-bottle was not sufficient for takingtemperatures from such great depths, especially if thebottle was not hauled up very rapidly. We know fromexperience that very great errors may arise in thismanner. There is also a possibility that the bottle mayhave been closed by accident on its way down, before. it reached the desired depth. Accidents such as thesemight often happen with the old Pettersson bottle, according to our experi-ence. But whatever the reason may be, Arrhenius temperature-readingscannot at any rate be considered trustworthy for depths greater than300 metres. By using the vertical temperature-curves of his four stations representedin Fig. 31, and trying to correct for the most obvious errors, we havefound a mean temperature for 100, 200, 300, and 400 metres, of °C. 38 HELLAND-HANSEN AND FRIDTJOF HANSEN. Kl. The mean tempe-5 6° rature of Isachsens 1 I | i **-^ Stats. 17, 18, and19 of July r 7th —18th, 1910, C. \ving to the hig-her latitude and the later season,the mean temperature of Arrhe-
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