4 GUNN. ISACHSEN. [2nd ARC. EXP. fram 



It was not until 1901 that we found a connection that fulfilled all 

 requirements. It was a kind of "universal coupling", that was strong 

 and kept in good order on all subsequent expeditions. 



The weight of the odometer and accessories was 3.9 kilogrammes. 



Two of our odometers are now with Captain Amundsen on the 

 "Gjoa", in polar regions. 



The Expedition was furnished with 3 box-chronometers, Kutter 

 No. 24 (Kt), Mewes (M), and Frodsham No. 3555 (Fr). These were 

 placed in a cupboard in Captain Baumann's cabin at a height of about 

 1.2 metre above the deck. In the saloon outside, a thermograph had 

 its place at a height of about 1.6 metre above the deck. The thermo- 

 graph was compared daily with the thermometer that hung close be- 

 side it. 



The pocket-chronometers used on the sledge-journeys — we had 

 six of them — were carried in a watch-pocket below the belt. They 

 were kept in a leather pouch with a lock, which in its turn lay in a 

 loose pocket of cat-skin that had the hair inside. When on board, 

 they were kept in the cupboard beside the above-mentioned ship's 

 chronometers. 



The chronometer Kutter, which proved to be the most uniform in 

 rate, formed the basis upon which all the calculations were made. 



The error of the chronometer Kutter on Greenwich mean time is 

 given below in Part III. The results are not smoothed, as the probable 

 degree of accuracy is scarcely large enough to give any value to a 

 smoothing of the few data. 



A comparison with the rate of the other chronometers has given 

 us no reason to doubt the correctness of the difference in longitude 

 between the winter haven of 1899 and that of 1900. 



Observations made on a sledge-expedition to Beechey Island (deter- 

 mined by several British expeditions), verify the longitude of the last 

 two of the Expedition's winter havens. 



