F. GENERAL RESULTS. 
In a treatise “Ueber die Darstellung der Ergebnisse erdmagnetischer Be- 
obachtungen im Anschluss an die Theorie”+), as also on several previous 
occasions, Professor Dr. Ap. Scamipr of Gotha has strongly advocated the 
desirability, in the publication of terrestrial-magnetic investigations from 
various quarters of the globe, of giving not only the directly observed values 
of the three magnetic elements, but also the difference between them and 
the theoretically calculated values for the points of observation in question, 
as in this way the material for a more and more wide-spread improvement 
of the theory of terrestrial magnetism would be collected. 
Dr. Ap. Scammpr has paid the Norwegian Polar Expedition the marked 
attention of offering to perform the arduous labour of calculating theoretically 
the value of the magnetic elements for all the points at which magnetic 
observations were made during the expedition, an offer which I have of 
course accepted with very great gratitude. I am therefore enabled, in the 
following list of all the results of the observations in chronological order, 
to append the deviation of every single result from the corresponding theo- 
retically calculated value. These differences (observed value minus calculated 
value), indicated in the table as O—C, are not, however, really strictly correct, 
as they contain the influence of the secular variation of the magnetic elements 
for a period of about 10 years, the values calculated theoretically by Dr. 
Ap. Scummt having reference to 1885°0, while the observations of the 
1) Annalen der Hydrographie und Maritimen Meteorologie. Jahrg. XXVI, Berlin 
1898, p. 21. 
