The resolutions adopted at the various international meetings of meteorologists have been collected in the “International Meteorological Codex,” the chief object of which is to secure uniformity in methods of observation, forms of publication, etc. One of the most notable international undertakings in the history of meteorology was the plan of simultaneous observations, at Greenwich noon, both at land stations and on board ships, adopted by the Vienna Congress at the suggestion of General Myer, and carried out under the auspices and mainly at the expense of the United States Signal Service. The results of these daily observations, from 1875 to 1887, were published in detail, with charts, by the Signal Service. The many bulky volumes of this series, illustrating the meteorology of the globe (or mainly the northern hemisphere) day by day for a period of more than a decade, are the modern analogue of the “Ephemerides” issued a century earlier by the Meteorological Society of the Palatinate--which cover very nearly the same length of time. In recent years the efforts of meteorologists have been bent toward establishing a so-called “réseau mondial,” or world-wide network of stations, which will not only provide telegraphic reports for the use of forecasters, but will also send their detailed records to an international commission to be compiled and published. The telegraphic feature of this project now bids fair to be realized in a manner that was not contemplated when the plan was originally proposed; viz., by the broadcasting of weather reports from high-powered radio stations all over the world. An effective “world weather bureau,” with permanent headquarters and staff, is at present the most urgent desideratum of practical meteorology. Such a bureau would not only tie together the national weather services of the world and greatly facilitate their operations, but would also digest the great mass of existing climatic statistics and provide for extending the climatological survey of the globe to regions where meteorological stations are scarce or lacking.