278 CARNEGIE INSTITUTION OF WASHINGTON. 



The Carnegie left her home port, Washington, October 9, 1919, for 

 a cruise (No. VI) of 64,000 nautical miles, requiring somewhat over 2 

 years for completion. For the first 6 months she will be cruising mainly 

 in the South Atlantic Ocean, where the completion of her work in 1917 

 was made unsafe during the war. Thence, after extending the work in 

 the Indian Ocean, carried out on the Carnegie in 1911, she will make 

 such cruises in the Pacific Ocean as are designed not only to cover large 

 areas not magnetically surveyed, but also to determine by intersection 

 of previous tracks of the Carnegie and of her predecessor, the Galilee, 

 the changes ever going on in the Earth's magnetism. These changes, 

 of course, will also be determined in the other oceans traversed by 

 again arranging the vessel's tracks so as to secure, as often as possible, 

 frequent intersections with previous tracks of the Carnegie. 



The heavy demand for vessels in the resumption of traffic and com- 

 mercial intercourse will probably make it impossible in the near future 

 for other countries to engage, or to participate, in ocean observational 

 and investigational work. It would seem, then, that added responsi- 

 bility is put upon us, and that we may have to regard it as our duty, 

 in spite of the heavy additional cost, to maintain the Carnegie in full 

 operation, certainly until a time when other nations have recuperated 

 sufficiently to share adequately in the promotion of work and researches 

 of international benefit and concern. The statement of the hydrog- 

 rapher of the British Admiralty, received in July 1917, to the effect 

 that in the preparation of the navigator's magnetic charts for 1917 

 chief dependence for new information had to be put upon the magnetic 

 work of the Carnegie Institution of Washington, will, doubtless, have 

 to be the case for some time to come in future editions of these charts. 



LAND MAGNETIC WORK AND ECLIPSE OBSERVATIONS. 



For reasons already stated, it was possible to resume the field obser- 

 vational work only to a limited extent. The field work successfully 

 accomplished during the period November 1918 to October 1919 is 

 briefly as follows, the details being given on pages 286-291. 



1. Africa. — Observer Frederick Brown, after discharge from the 

 British Army, reentered the employ of the Department on March 

 1 and, after preparations under the Director's guidance at London, 

 sailed from Liverpool on April 8 for Douala, Cameroun, where he 

 arrived May 2. After securing repeat observations at various 

 stations, he participated in the international eclipse magnetic 

 observations of May 29, his station being Campo, Cameroun, 

 about 100 miles north of the belt of totality. He next set out on 

 June 11 for an overland trip through the interior of Cameroun, 

 from Kribi to Fort Lamy, near Lake Tchad. Thence he will return 

 to Douala via a route through the western part of the French 

 Kongo. 



In connection with the eclipse observations at Cape Palmas, 

 Liberia, 3 magnetic stations were occupied in the vicinity by the 

 Director and Magnetician H. F. Johnston. 



