GEELMUYDEN. ASTRONOMICAL OBSERVATIONS. [NORW. POL. EXP. 



Table d (concluded). 



The column of rates for Kt Htv shows some considerable irregularities 

 which cannot be explained by any progressive term and which almost com- 

 pletely mask the effect of temperature. In the rate of Iv Htv the effect of 

 temperature is very prominent (between 8 .2 and s .3 per degree) and the 

 casual irregularities are smaller and of a different character, from which it 

 follows that the irregularities in the column Kt Htv are due to Kutter. After 

 the return of the expedition all the three chronometers were kept going for 

 some time in the Christiania Observatory without being touched; for Htv 

 and Iv a series of comparisons were available also from the the time imme- 

 diately preceding the departure in 1893. Kutter arrived from Germany only 

 some few days before the departure, but by the courtesy of Professor NEU- 

 MAYER the writer is in possession of a series of comparisons made from the 

 beginning of 1893 in the Deutsche Seewarte. 



