DEPARTMENT OF TERRESTRIAL MAGNETISM. 281 



MISCELLANEOUS ACTIVITIES. 

 American Geophysical Union. — At the annual meeting of the Union in 

 Washington, March 6 to 8, 1922, the following reports were presented by 

 members of the Department: 



Louis A. Batjer. Progress report of Committee on Relations between Terrestrial Mag- 

 netism, Terrestrial Electricity, and Solar Activity. (The members of the 

 committee are Louis A. Bauer, chairman; C. G. Abbot, R. L. Paris, G. E. 

 Hale, and C. P. Marvin. See abstract, p. 289.) 



J. A. Pleming. Progress report of Committee on Magnetic Standards, and Instruments 

 and Methods for Aerial Magnetic Measurements. (Members of committee, 

 J. A. Pleming, chairman; C. G. Abbot, J. P. Ault, S. J. Barnett, and J. T. 

 Watkins. See abstract, p. 299.) 



S. J. Mauchly. Progress report of Committee on Earth-Currents and Polar Lights 

 (Members of committee, S. J. Mauchly, chairman; J. H. Bellinger, A. J. 

 Henry, A. G. McAdie, A. G. Mayor, and W. E. Parker. See abstract, p. 305.) 



Among the officers for the period July 1, 1922 to June 30, 1924, are the 

 following members of the Department: Louis A. Bauer, chairman of the 

 American Geophysical Union and vice-chairman of the Section of Terrestrial 

 Magnetism and Electricity; J. P. Ault, chairman of the Section of Physical 

 Oceanography; J. A. Fleming, secretary of Section of Terrestrial Magnetism 

 and Electricity. 



International Geodetic and Geophysical Union. — The Director of the Depart- 

 ment attended the Rome meetings of the International Union, May 2 to 10, 

 1922, as a delegate from the National Research Council and the American 

 Geophysical Union, and as secretary and director of the Central Bureau of 

 the International Section of Terrestrial Magnetism and Electricity. Various 

 reports were prepared for these international meetings by Messrs. Bauer, 

 Fleming, Mauchly, and Peters. For a summary of the proceedings and 

 chief conclusions reached at these international meetings, see pages 292-294. 



The Director has continued throughout the year his duties as secretary 

 and director of the Central Bureau of the International Section of Terrestrial 

 Magnetism and Electricity. 



National Research Council. — Various duties have been performed by Messrs. 

 Ault, Barnett, Bauer, Fleming, Mauchly, and Peters in connection with 

 committees of the council, or in accordance with requests for information on 

 specific topics. Suggestions and drawings regarding the mounting of a mag- 

 netic variometer for exhibit purposes in the National Academy building were 

 prepared by Messrs. Bauer and Fleming. 



Director's inspection trip. — After the conclusion of the meetings of the 

 International Geodetic and Geophysical Union and of International Astro- 

 nomical Union at Rome, May 2-10, 1922, the Director sailed from Marseilles 

 on May 19 for Western Australia and New Zealand. Arriving at Perth on 

 June 15, an inspection trip was made to the Department's magnetic observa- 

 tory at Watheroo, June 17 to 20, and arrangements were completed for con- 

 tinuous earth-current observations at this observatory (see p. 277). En route 

 to Perth the observatories at Bombay and Colombo were visited. On July 

 4 and 5 the Director attended a specially called meeting at Wellington of 

 the Samoa Observatory Honorary Board of Advice, at which matters were 

 discussed relating to the continued operation of the Apia Observatory 

 under the joint auspices of New Zealand, the British Admiralty, and the 

 Carnegie Institution of Washington. Arrangements were also made for 



