284 CARNEGIE INSTITUTION OF WASHINGTON. 



bureau directors called at London, July 3 to 9, by Sir Napier Shaw, 

 president of the pre-war International Meteorological Committee. 

 From July 18 to 28 he attended at Brussels, as delegate, by appoint- 

 ment of the president of the National Academy of Sciences, the meet- 

 ings of the International Research Council, International Geodetic 

 and Geophysical Union, and of other unions established by the council. 

 A brief account of the actions taken at Brussels on matters of interest 

 to the Department is given on pages 309-311. It will suffice to state 

 here that a Section on Terrestrial Magnetism and Electricity of the 

 International Geodetic and Geophysical Union was established and 

 tentatively organized as follows: A. Tanakadate (Japan), president; 

 Charles Chree (England), vice-president; Louis A. Bauer, secretary 

 and director of the central bureau. 



DETAILS OF OBSERVATIONAL AND EXPERIMENTAL WORK. 

 OCEAN-SURVEY WORK. 



At the conclusion of Cruise V on June 30, 1918, the ocean-survey 

 work was discontinued for the remaining period of the war. Dr. 

 H. M. W. Edmonds continued in command of the Carnegie in Wash- 

 ington through December 1918, and had general supervision of the 

 overhauling and dismantling of equipment and instruments. On 

 December 31 he was relieved of conmiand to take charge of and to 

 prepare for the important work of acquiring a site and constructing the 

 proposed observatory in Peru. 



Mr. J. P. Ault resumed command of the Carnegie on January 1, 1919, 

 and took up the general overhauling, repairing, and outfitting of the 

 vessel for the resumption of the ocean-survey work. A cruise of 2 or 3 

 years was planned to start in August 1919, as it was expected that the 

 repairs and alterations would then be completed. The unsurveyed 

 regions in the South Atlantic and Indian Oceans are to be covered and 

 the return is to be made through the Pacific Ocean and Panama Canal 

 to Washington. The route is planned to obtain a large number of 

 secular-variation observations, and will include calls at the following 

 ports: Dakar, West Africa; Buenos Aires, Argentina; St. Helena 

 Island; Cape Town, South Africa; Aden, Arabia; Perth, Australia; Lyt- 

 telton, New Zealand; Papeete, Tahiti, Society Islands; Fanning Island; 

 Honolulu, Territory of Hawaii ; Marquesas Islands ; Balboa and Cristo- 

 bal, Canal Zone; San Juan, Porto Rico; and return to Washington. 



Early in 1919 it was decided to convert the Carnegie's engine to 

 operate on gasoline instead of on producer gas. This change seemed 

 desirable because gasoline can now be secured in all frequented ports 

 of the world and because of the increase in efficiency and reliability of 

 operation resulting from the use of gasoline instead of producer gas. 

 In accordance with this plan, early in March 1919, the engine was 



