DEPARTMENT OF TERRESTRIAL MAGNETISM. 325 



Maintirano, where he arranged to cover the remaining distance back 

 to Majunga by sailing cutter, arriving there on June 28. 



Ninety-four stations were occupied in Madagascar; 11 were more or 

 less precise reoccupations of previous stations by the French Hydro- 

 graphic Service or by Father Colin, and 11 were auxiliary stations 

 established for testing for the existence of local disturbance or to secure 

 a more favorable location after occupying a previous station in the 

 same general region. The station at Majunga was occupied at the 

 beginning of the work and again at the close. Of the 6,000 kilometers' 

 travel necessary to reach these stations, all but about 1,600 were made 

 on foot with carriers. A line of stations was secured along almost the 

 entire length of the eastern coast, another roughly parallel along the 

 high plateau east of the central axis of the island, and a line of stations 

 more widely spaced along the western coast, thus completing a very 

 satisfactory distribution of stations. 



Mr. Brown returned to Africa after the completion of the Mada- 

 gascar program to make observations at selected repeat stations, par- 

 ticularly those of 1909 by Professors Beattie and Morrison. He 

 arrived at Zanzibar July 8, and at Dar-es-Salaam, July 11. After a 

 railway journey inland to Ujiji, Lake Tanganyika, he next went to 

 Mombasa, Kenya Colony,'>nd inland by railway to Kisumu (Port 

 Florence) on Lake Victoria. During these two trips he reoccupied 

 11 stations of 1920 besides other selected stations along the railway 

 lines. Leaving Mombasa on August 24, he arrived at Aden, Arabia, 

 on August 29, and sailed for Jibuti, French Somaliland, which was 

 reached on September 3. From this point he traveled inland to 

 Addis Abeba, Abyssinia, where he reoccupied Mr. WaUis's station of 

 1914, and Mr. Sawyer's station of 1918, and on his return two inter- 

 mediate repeat stations along the railway. The data for secular- 

 varition thus secured along the east coast of Africa are especially 

 valuable and well distributed. 



In order to close satisfactorily the work and to control the instru- 

 mental constants as required after so severe and long a campaign, Mr. 

 Brown proceeded by way of Aden, Arabia, and Colombo, Ceylon, to 

 the Watheroo Magnetic Observatory, in Western Australia, and 

 secured a comparison of standards while still in the southern magnetic 

 hemisphere. After having obtained these comparisons, Mr. Brown 

 completed his field work, which has extended over a continuous 

 period of 2| years and will return to Washington by way of Singa- 

 pore and Canton. 



ASIA. 



The work of the "Maud Expedition," under the command of Captain 

 Roald Amundsen, with whom the Department is cooperating, was 

 continued into 1921, but it was suspended temporarily later in the year 

 because of return of the expedition to Seattle for repairs of vessel. 



