BJØRN HELLAND-HANSEN AND FRIDTJOF NANSEN.] 



M.-N. Kl. 



The water-samples were preserved in'bottles with patent lever stop- 

 pers of the kind now generally used in oceanographical work; the bottles 

 contained about 250 c.cm. The salinity has been determined by Mohr's 



Fig. I. The océanographie Stations and Sections of the Isachsen Spits- 

 bergen Expedition 1910. Sect. IX (with Stats. 38 — 40) north of Spits- 

 bergen should he added. 



ordinary chlorine-titration; the titrations were made by Mr. Illit Grøndahl 

 in January and February, 191 1. He had standard water from the Inter- 

 national Bureau in Copenhagen, and had the silver-solution controlled for 

 every loth to 15th titration of the water-samples. 



The expedition was equipped with two Richter reversing thermo- 

 meters, two Nansen-thermometers for the insulating water-bottles, and two 

 surface-thermometers. 



One of the reversing thermometers was useless, as it did not break 

 off properly. The other one, no. 60, was better, but not quite trust- 



