OFFICERS OF SECTIONS 
Section 
Geodesy 
Seismology 
Meteorology 
Terrestrial Magnetism 
and Electricity 
Oceanography 
Volcanology 
Hydrology 
Tectonophysics 
President 
W. D. Sutcliffe 
V. C. Stechschulte 
Fo W. Reichelderfer 
H. F. Johnston 
H. U. Sverdrup 
Richard E. Fuller 
J. E. Church 
Ernst Cloos 
Vice-President 
Philip Kissam 
Frank Neumann 
H. R 0 Byers 
I. Roman 
W. L. Schmitt 
Howel Williams 
L. G. Straub 
L. L. Nettleton 
Secretary 
J. A. Duerksen 
L. M. Murphy 
H. D. Harradon 
Do G. Knapp 
L 0 P» Disney 
Francis G 0 Wells 
K. Ho Beij 
M. K 0 Hubbert 
COMMITTEE ON TWENTY-EIGHTH ANNUAL MEETING 
J. P. Marble, Chairman 
Merrill Bernard 
G, B. Cressey 
R. A. Hertzler 
W. D. Sutcliffe 
Co L. Garner 
GENERAL MEETINGS OFTHE UNION 
SMOKER 
Tuesday, April 29, 1947, 20h00m to 22h00m, Auditorium of the 
Cosmos Club, Madison I^lace near H Street, Northwest 
This well be an informal get-together. No program has been planned. Refreshments will be 
served. Tickets are fifty cents, and will be sold in advance at the Main Registration Desk in the 
National History Building. 
GENERAL ASSEMBLY AND BUSINESS SESSION 
Wednesday, April 30, 1947, 14^00^, Room 4 (Auditorium, Natural History Building) 
General Assembly 
(1) J. TUZO WILSON: Some aspects of geophysics in the Canadian Shield, with special refer¬ 
ence to structural research 
(2) R. M. FIELD: Interim reports on the work of the Commission on Continental and Oceanic 
Structure, and the Committee on the Social Value of the Earth Sciences, International 
Union of Geodesy and Geophysics (10 minutes) 
Business Meeting 
(1) Reports of officers and of standing and special committees including: 
(a) Consideration of report of Committee on Resolutions [Earl Ingerson, Chairman; 
J. P. Marble, and N. H. Heck] 
(b) Report on plans for the New England Meeting of AGU in September, 1947 [R. M. 
Field, Chairman] 
(2) Unfinished business 
(3) New business 
EVENING SESSION 
Wednesday, April 30, 1947, 20h30m J Elihu Root Hall, Carnegie 
Institution of Washington, 1530 P Street, Northwest 
(1) Address of Retiring President L. H. ADAMS who will speak on some of the great unsolved 
problems of geophysics 
(2) Ninth Award of the William Bowie Medal 
(a) Citation (b) Presentation by L. H. ADAMS (c) Acceptance 
(3) Social hour and refreshments 
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MEETINGS OF THE SECTIONS 
SECTION OF GEODESY 
Wednesday, April 30, 1947, 09h00m y Room 4 (Auditorium, Natural History Building) 
Business Session 
(a) Reports of committees 
(b) Announcement by Section Tellers of the officers elected by the Section for the triennium 
beginning July 1, 1947 
(c) Other business 
Scientific Session 
(1) J. E. SPEERT: Survey net adjustment by electrical analogue 
(2) B. K. MEADE: Earthquake investigation in the vicinity of El Centro, California: Horizontal 
movement 
(3) J. B. SMALL: Vertical movement of bench marks near fault lines in Southern California 
(4) E. J. PARKIN : Vertical movement in the Los Angeles region, 1906-1946 
(5) R. H. MONTGOMERY: Precise leveling on the Alaska highways 
(6) J. A. O'KEEFE: Errors of the doubly equidistant projection 
(7) L. E. SHMIDL: Simultaneous adjustment of multiple arcs of triangulation 
(8) FRED ANDEREGG: Report of preservation and classification of aerial photograph in 
United States of America and in other countries 
(9) IVAN TOLSTOY: Punched card computation of isostatic and topographic reductions 
(10) G. P. WOOLLARD: Recent regional gravitational surveys in eastern North America 
(11) J. H. BRITTAIN: Progress in geodetic surveys by the United States Coast and Geodetic 
Survey since July, 1946 
(12) MANUAL MEDINA: Geodetic work accomplished in Mexico from May, 1946 to February, 1947 
SECTION OF SEISMOLOGY 
Monday, April 28, 1947, 09h00m, Room 4 (Auditorium, Natural History Building) 
Business Session 
(a) Reports of committees 
(b) Announcement by Section Tellers of the officers elected by the Section for the triennium 
beginning July 1, 1947 
(c) Other business 
Scientific Session 
(1) MAURICE EWING and FRANK PRESS: A theory of microseisms, with geologic applications 
(2) ROSS R. HEINRICH: The Ozark earthquake of October 6, 1946 
(3) J. B. HERSEY and MAURICE EWING: Reflection of sound from beneath the ocean floor 
(4) THOMAS C. POULTER: Seismic measurements on the Ross Shelf Ice 
(5) ELLIOTT B. ROBERTS: Some trends in seismology 
(6) FRANK PRESS and MAURICE EWING: Elastic waves in a floating ice sheet 
(7) D. S. HUGHES: Remote recording seismograph 
(8) ANATOL J. SHNEIDEROV: On a pattern in celestial configuration in the years of major 
earthquakes 
(9) JAMES B. MACELWANE: Progress Report for the Jesuit Seismological Association for 
1946 
(10) BENO GUTENBERG and CHARLES F. RICHTER: Earthquake study in Southern California, 
1946 
(11) LEONARD M. MURPHY: Geological effects on microseisms in the Caribbean 
SECTION OF METEOROLOGY 
Monday, April 28, 1947, 14h00 m , Room 4 (Auditorium, Natural History Building) 
Business Session 
(a) Announcement by Section Tellers of the officers elected by the Section for the triennium 
beginning July 11, 1947 
(b) Other business 
Scientific Sessions 
(1) IRVING I, SCHELL: The Sun's spottedness as a possible factor in the polar air outbreaks 
in northwestern North America (10 minutes) 
(2) ARNOLD COURT: Thermal gradient in the Ross Shelf Ice (10 minutes) 
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