An preparing the present Memoir I have had the assistance of 

 Miss Louise Mohn, who reduced the main part of the observations and 

 woriced up the Tables, and of Mr. Aa. Graarud, First Meteorologist in 

 the Norwegian Meteorological Institute, who made the harmonic-analysis 

 computations and prepared Tables from the observations made on board 

 the 'Fram' under way. Capts. Sverdrup, Isachsen and Baumann have 

 furnished me with valuable remarks regarding the circumstances under 

 which the observations were made. Miss J. Muir has revised my 

 English manuscript. 



The proofs have been read by Miss Mohn, Mr. Graarud and Miss 

 Muir. 



The places named in the Memoir the reader will find in the maps 

 accompanying Capt. Isachsen's Memoir "Astronomical and Geodetical 

 Observations" published in the Report of the Second Norwegian Arctic 

 Expedition in the 'Fram' 1898—1902, No. 5, Vol. II, and in Capt. 

 SvERDRUP's Narrative of the voyage in his book "Nyt Land". 



April 1907. 



H. Mohn. 



