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 codrdi- 
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. 
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