The section held sessions for the discussion of its agenda on four half days and additional half day was devoted to joint sessions with the sections of Hydrology, Oceanography, and Terrestrial Magnetism and Atmospheric Electricity. The results of the discussions me embodied in a series of 27 resolutions, which may be classified as follows:
(a) Resolutions 4, 5, 14, and 15, in which questions were referred to some other organization for action.
(b) Resolutions 1, 6, 9, 11, 12, 13, 20, 21, 23, 24, 25, and 27, which express an opinion, or make a recommendation, but do not contemplate action on the part of the section.
(c) Resolutions 2, 3, 7, 8, 10, 16, 17, 18, 19, 22 and 26, which call for action on the part of the section.
Under (a) the 4 resolutions refer to cloud classification and the measurement of cloud heights; the centralization of meteorological observations made at sea; and trans-Atlantic steamer tracks.
Under (b) the 12 resolutions refer to the collection of publications of the Union in designated libraries; the determination of the variability of the hydrogen content of the atmosphere; spectral measurements of solar radiation at Izana, Canary Islands: the extension of radiotelegraphic transmission of meteorological observations; daily observations of temperature and pressure in the free air; an increase in the number of hydrological and meteorological stations in mountainous districts; the simplification of the Gregorian calendar; extension and improvement of the network of stations in the south Pacific; observations of air-borne parasites; and commendatory of the work inaugurated at Teneriffe and on the Jungfrau col.
Under (c) the 11 resolutions relate to administrative work of the bureau of the section; sampling the air at great heights; the equipment of additional stations with radiation apparatus; the measurement of the relative brightness of ground and cloud surfaces; illustrations of methods employed in forecasting the weather; cooperation in obtaining sounding balloon observations; atmospheric dust investigations; illustrations of the application of a simplified calendar to meteorological observations; and the compilation of weather charts of the Northern Hemisphere.
Paper presented before the meeting of the American Meteorological Society, Washington, D. C., January 2, 1925.