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6.-Improvement of stars catalogues
The I.U.G.G., considering that various geodetic programs will bene
fit from the increase in accuracy of positions and proper motions of
stars brighter than the 9th magnitude, supports the plans for a third
observation of all AG stars in the northern sky, and expresses the hope
that these plans may be extended to include the stars in the
southern sky.
7-Under-zvater gravimetric measurements
The I.U.G.G., considering how important it is to make gravity
survey in the vast shallow water areas of the Oceans and knowing
that the under-water gravimeters offer a fast and accurate method of
making such surveys, recommends that the countries which have large
shallow water areas should carry out under-water gravimeter meas
urements on as large a scale as possible.
8.International graznmetric Commission
The I.U.G.G. recommends that the International Gravity Commis
sion should be maintained and expresses the hope that a meeting of the
Commission will be held before the nexf General Assembly, for
example in 1956, and that, before this meeting, the Commission's
study groups should report on the various problems which arise from
the establishment of the international gravity network.
9.Extension of oceanic depths measurements and gravity observa
tions in submarines
The I.U.G.G., considering that an adequate knowledge of depths
of Oceans and of values of gravity throughout the entire globe are
necessary in order to determine the exact shape of the earth and the
external gravity fieldconsidering that both the exact shape of the
earth and the external gravity field are of great and increasing im
portance in modern times; considering that in exterior regions,
especially the Pacific, the Indian Ocean, the South Atlantic and the
Polar regions, data 'for either or both depths and gravity are non
existent or inadequate; considering that great efforts will be needed
to provide this data and that these efforts are urgently necessary,
resolves to call upon National Committees of all maritime countries
adhering to the Union to bring to the notice of their governments
the high importance of extension depth measurements by echo-
sounding in surface ship and of gravity observations in submarines,
and to request that results should! be compiled and published period
ically as soon as available.
10.Lines of geoidal section
The I.U.G.G., with a view to strengthening the delimitation of the
form of the geoid in Europe and to connecting it to work already
completed along the arc of the 30th Meridian in Africa, expresses the
