190 AKSEL S. STEEN. TERRESTRIAL MAGNETISM. [NORW. POL. EXP. 



and Z, which may then approximately be assumed to be applicable to the 

 latitude and longitude obtained as the average of the mean geographic coordi- 

 nates calculated for the declination, horizontal intensity, and inclination of 

 the group. The results thus deduced are given in the following concluding 

 table, which also contains an enumeration of the stations that are employed 

 in the making-up of each separate group of the 33, the groups being num- 

 bered with Roman numerals. 



Stations 1 and 2 do not fit into any group. No. 2 is therefore entered 

 separately; but it has been impossible to include No. 1, as there was no 

 opportunity of making any determination of declination at this station. 

 Station 15 has been employed in two groups, III and IV. 



