II 



the sledge-journey, in which he has set forth the results of his work that 

 has been of such importance to the expedition. These charts give highly 

 interesting information of the drift of the ice during the several seasons 

 of the year. The relation of this drift to winds and currents will be 

 discussed in a later Memoir on the Oceanography, which will shortly appear 

 in Vol. HI. 



Memoir VII, on Terrestrial Magnetism, has been prepared by Mr. AKSEL 

 S. STEEN, Sub-director of the Meteorological Institute of Christiania, and 

 contains SCOTT-HANSEN'S Magnetic Observations and their results. As 

 mentioned by Mr. STEEN, Prof. G. NEUMAYER gave the expedition his 

 valuable assistance by taking charge of our magnetic equipment. He had 

 the instruments made according to his orders, and partly according to his 

 special design; and he also gave Capt. SCOTT-HANSEN careful instruction 

 in the use of the instruments, and in the methods of making observations. 

 I hope it may give him some satisfaction to see how well his instruction 

 has been utilized, and to see the important results of SCOTT-HANSEN'S 

 observations, which have been so ably and carefully worked up by Mr. AKSEL 

 S. STEEN. Prof. AD. SCHMIDT of Gotha has much increased the scien- 

 tific interest of these results by kindly calculating theoretically the values 

 of the magnetic elements for all localities where magnetic observations were 

 made during the expedition. 



Memoir VIII, on the Results of SCOTT-HANSEN'S Pendulum Observations, 

 has been prepared by Prof. 0. E. SCHIST z, who has also added some 

 interesting conclusions with regard to the constitution of the earth's crust, 

 which he thinks may be drawn from these observations. When I planned 

 the expedition, I considered it not impossible that we might meet with 

 unknown land in high latitudes; and as in such a case it would be of great 

 importance to be able to take pendulum observations, Prof. 0. E. SCHIOTZ 

 kindly undertook to equip us for this purpose. It was decided to order a 

 pendulum apparatus of Colonel VON STERNECK'S pattern from Vienna, and 

 VON STERNECK himself had the great kindness to determine the constants 



