The sea west of Spitsbergen; the oceanographic observations of the Isachsen Spitsbergen Expedition in 1910 . BJ0RN HELLAND-HANSEN AND HANSEN. Kl. Fig. 5. Vertical Temperature-Curves of Sect. IV7. Readings of Nansen-thermometer are not corrected. Orrt 700 -. 200 300 5: WO 500 — 600 700 800 900 — 100O 1100 1200 m - 1300 hoo 1500 The sameRichter revers-ing thermome-ter No. 60 wasused the wholetime. It is notthis instrument conceivable how could suddenly have altered its error so considerably as to account for the mentioned irregularites during the first period of the expedition (a
The sea west of Spitsbergen; the oceanographic observations of the Isachsen Spitsbergen Expedition in 1910 . BJ0RN HELLAND-HANSEN AND HANSEN. Kl. Fig. 5. Vertical Temperature-Curves of Sect. IV7. Readings of Nansen-thermometer are not corrected. Orrt 700 -. 200 300 5: WO 500 — 600 700 800 900 — 100O 1100 1200 m - 1300 hoo 1500 The sameRichter revers-ing thermome-ter No. 60 wasused the wholetime. It is notthis instrument conceivable how could suddenly have altered its error so considerably as to account for the mentioned irregularites during the first period of the expedition (at all Stations from No. 1 to No. 14 in June), considering that it has obviously given very accurate determinations of the temperature at all later stations where we can control them, by means of the temperature-readings taken, in the bottom-water at great depths. We must therefore conclude that it is theNansen-thermometer which has given too low values,and this is conceivable if the drop of mercury foundin the upper bulb of the thermometer after its re-turn from the expedition, has been much larger inJune, 1910, than it was in Jul}- and later (when theerror caused by it amounted to ° C, as be-fore mentioned I. The temperature-curves of Figs. 5 and 6 (Sec-
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