摘要:

The American Geophysical Union is hereby established by the National Eesearch Council. It supersedes the “American Section of the proposed International Geophysical Union.” The American Geophysical Union is the American National Committee of the International Geodetic and Geophysical Union and the Executive Committee of the American Geophysical Union is the Committee on Geophysics of the National Research Coun

ISSN:0002-8606    

DOI:10.1029/TR006i001p00005

年代:1925

数据来源: WILEY

摘要:

The second general assembly of the Union took place in Madrid, beginning October 1, 1924, in the building of the National Parliament. The king of Spain presided at the first meeting and the proceedings consisted of addresses of welcome. Then for a week the several sections met in different rooms and discussed matters of special interest to themselves. There are now thirty nations adhering to the Union, and nearly all were represented by delegates or by proxy. The United States had but four delegates, which made it impossible to keep in close touch with the discussions of the seven sections. At the final meeting on October 8 the several sections reported the results of their conferences to the general assembly.

ISSN:0002-8606    

DOI:10.1029/TR006i001p00011

年代:1925

数据来源: WILEY

摘要:

Early in 1924 it was realized by the Executive Committee of the Section that the agenda for the Madrid meeting would be a very heavy one. As is well known, the geodetic work that is considered by the Section consists of a number of branches; among them may be enumerated—astronomic longitudes, latitudes and azimuths; measurement of base lines; triangulation of various degrees of precision; traverse, precise leveling, gravimetric surveys, mean sea level, which furnishes starting points for leveling; variation of latitude; projections; figure of the earth; the theory of isostasy; and trigonometric leveling. Each of the foregoing subjects should be considered at an international conference, for it is only by securing the active co‐operation of geodesists in the various countries that the best results can be obtai

ISSN:0002-8606    

DOI:10.1029/TR006i001p00014

年代:1925

数据来源: WILEY

摘要:

Delegates to the Madrid Meetings of the International Union of Geodesy and Geophysics in October, 1924, will cherish the memory of the deep blue skies, the crisp, invigorating October atmosphere, and, above all, the hearty and open‐handed hospitality of Spain. While especial mention should be made of Senors Cubello and Galbis of the Madrid committee for their efforts in our behalf, it was, after all, the Spanish nation, headed by their majesties the King and the Queen, and assisted by their ministers, that really gave to the meetings their setting of artistic beauty. It was refreshing as well as a relaxation to pass from the tenseness of a scientific conference to a reception in the Royal Palace, a concert in the Royal Theater, a banquetà la Madrid, or an excursion to a suburban restaurant, an art museum, a scientific observatory, or, for some of the delegates at least, even a bull fight. The memory of these various delights forms the artistic background for our mind's picture of the scientific conferences, which engaged our days in Madrid, and about which I am now to speak to you, confining myself to the meetings of the Meteorological Secti

ISSN:0002-8606    

DOI:10.1029/TR006i001p00016

年代:1925

数据来源: WILEY

摘要:

Bulletin No. 4 of the Section of Terrestrial Magnetism and Electricity of the International Geodetic and Geophysical Union, consisting of ten pages and devoted to a General Report of the Madrid Meeting of the Section, was issued last December, by the writer, who was re‐elected Secretary and Director of the Central Bureau of the International Section for the period 1924–1930. As a copy of this Bulletin has already been sent to each member of the American Section, it will not be necessary to go into further detail here.It will be of interest, however, to report that arrangements are already under way towards putting into effect some of the twenty‐two resolutions which were passed at the Madrid meeting. Thus, word has been received from Dr. D. la Cour, director of the Danish Meteorological Institute, that, in accordance with Resolution No. 8, a permanent observatory will be established this coming summer at Godhavn, just south of Disco, on the west coast of Greenland. There are also indications that, following Resolution No. 10, the Canadian Government before long will fully equip the Meanook Magnetic Observatory; at the present time only photographic records of the variations of the magnetic declination are being obtained at this observatory, nearest of any to the North Magnetic

ISSN:0002-8606    

DOI:10.1029/TR006i001p00019

年代:1925

数据来源: WILEY

摘要:

Eight countries were represented and two, Canada and the United States, sent reports. Prof. Odon de Buen of Spain was elected president of the Section in place of the Prince of Monaco, deceased, Dr. Magrini continuing as Secretary.Secretary's Report.—The Secretary's report brings out the fact that with the suppression of the sub‐section of Oceanography of the International Union of Biology which was established at Brussels, the name of the Section was changed from Section of Physical Oceanography to Section of Oceanography, to include both fie

ISSN:0002-8606    

DOI:10.1029/TR006i001p00020

年代:1925

数据来源: WILEY

摘要:

Whereas, We, the members of the American Geophysical Union, have learned with sincere regret of the death, on March 10, 1925, of our associate, Dr. John Fillmore Hayford, Director of the College of Engineering of Northwestern University, therefore be itResolved, That we express our deep sorrow in the loss of this member, whose active work in the American Geophysical Union began with its organization in 1919. He held the office of Chairman of the Section of Geodesy from July 1, 1922, to June 30, 1924, and, not being eligible for immediate re‐election, that of Vice‐Chairman from July 1, 1924, until the time of his de

ISSN:0002-8606    

DOI:10.1029/TR006i001p00025

年代:1925

数据来源: WILEY

摘要:

In the beginning of geodetic operations the controlling interest appears to have been to arrive at a more certain knowledge of the exact size and shape of the earth; and, again, to find some exact and reproducible natural unit of linear measure.The next application of the trigonometric method was in fixing of control points (their latitudes and longitudes) upon which to construct topographic maps of land areas of countries. And, yet a little later on, to hydrographic surveys for charting the sea coasts and connecting waters.

ISSN:0002-8606    

DOI:10.1029/TR006i001p00031

年代:1925

数据来源: WILEY

摘要:

This paper gave the results of recent time determinations made at the U.S. Naval Observatory with two instruments and the comparisons by means of wireless signals of the time determinations made at different national observatories during the past two years.The two instruments were the 6‐inch transit circle and a portable transit of 3‐inch aperture made by Prin of Paris, each instrument being equipped with an impersonal micrometer. The same stars were observed each night on both instruments and the transits were recorded on the same chronograph so that the comparison was not affected by any errors in the star places nor by any lag of rel

ISSN:0002-8606    

DOI:10.1029/TR006i001p00034

年代:1925

数据来源: WILEY

摘要:

In connection with my work at the U.S. Bureau of Standards in the calibrating of various geodetic instruments and in the preparing of occasional specifications for instruments of this sort as well as in consequence of my visit to European standardizing laboratories I have become deeply interested in this subject. As I have been fortunate in my opportunities for seeing and working with geodetic instruments in several countries, a brief critical description of a few of these may be of some interest. A discussion of these leads naturally to some remarks on geodetic instrument design, and then to a brief outline of the efforts being made in the Section of Length Measurements at the Bureau of Standards to cooperate in geodetic work.

ISSN:0002-8606    

DOI:10.1029/TR006i001p00036

年代:1925

数据来源: WILEY