KONGL. SV. VET. AKAi5ÉMlBNS SANDLiNGAÉ. BAND 24. N:0 II. 153 



abandoned. The volume of the sample was ascertained by fiUing the tube with distilled 

 water to a certain mark and measuring its capacity after the experiment. 



The amount of halogens in the seawater was ascertained by careful titration with 

 silver-nitrate (V5 solution), with chromate of potassinm as indicator. The amount of salt 

 was calculated by application of F. L. Ekman's coefficient. 



The temperature-soundiiigs were taken partly with Negretti and Zambra's deep sea 

 thermometers, which were adapted to the water-bottle in the manner shown in tig. 2, partly 

 by Ekman's isolating Avater-bottle. 



III— VIII. 

 Results and observations of the expedition 1890. 



The map on pl. I shews the depths of the Skagerack and Kattegat and the position 

 of the principal stations Avhere temperature-soundings were made and samples of water 

 coUected from the layers at various depths. 



The hydrographic stations on the line Gothenburg — Hamburg are marked by the 

 letter H and the observations made will be found on page 28 — 29. Likewise the stations 

 on the i'oute Gothenburg — Christiansand — Bergen are marked C (see page 32, 33, 34); 

 on the line Gothenburg — Hållö — Öster-Risör marked S (see p. 40, 41, 42); between the 

 Swedish coast at Fjellbacka and Fredriksva^rn and thence to Strömstad and along the coast 

 marked A (see p. 56, 57, 58); and across the Kattegat from Gothenburg to Fredrikshavn 

 and thence round Leesö to Varberg marked G (p. 65, 66). 



Thus, for instance. Cm denotes the third station on the line between Gothenburg 

 and Christiansand etc. 



The hydrographic constitution of the sea from the surface to the bottom with regard 

 to temperature and salinity in different parts of the Skagerack and Kattegat is graphically 

 represented on plates III — VIII by sections taken along the principal lines of investi- 

 gation, thus: 



Plate III, section 1, Skagen — Christiansand. 



» 2, Gothenburg — Fredrikshavn. 



» 3, S. of Lffisö — Varberg. 



» 4A, from the lightship of Skagen to the lightship of Lasso Rende, 



Febr. 10, 1890. 

 » 4 B from the lightship of Skagen to the lightship of Lsesö Rende, 



Febr. 13 & 14, 1890. 

 Plate IV, section 5, Gothenburg — O. Risör. 



» 6, from station Sm to the Swedish coast. 



» 6 A, part of the same line represented on a larger scale: entrance to 



Stigfjoi'd. 

 » 6 B, entrance to Stigfjord six months låter in July 1890. 

 » 6 C, entrance to Stigfjoi-d in February 1891. 



K. Sv. Vet. Akad. Handl. Band. 24. N:o 11. 20 



