Sixth Meeting of the International Commission for Scientific Aeronautics
The Sixth Meeting of the International Commission for Scientific Aeronautics took place in Monaco, from 31 March to 6 April, 1909. The focus of the International Commission for Scientific Aeronautics, established in 1896, was on the use of aeronautics for scientific purposes including meteorology. The commission met at the Monaco Oceanographic Museum at the invitation of honorary member Prince Albert I.
The perceived role of the commission had somewhat expanded due to advances in aviation. "Aerology", the study of the atmosphere, was no longer only an end in itself, but also could enable flight and enhance its safety. Richard Assmann articulated this new role and was supported by Major H. Gross of the German air battalion and by a counterpart in Spain. Members expressed support for a permanent international system of aerological observations. The Vienna Aero Club and Austrian Ministry of War were applauded in sharing their aerological observations for the purpose of aviation, and cooperation from other aero clubs was seen as desirable.
The International Commission on the System of World-stations, another subcommittee appointed by the International Meteorological Committee, met in tandem. Teisserenc de Bort, president, and Hugo Hildebrand Hildebrandsson, secretary.
President Hugo Hergesell reviewed a simultaneous balloon/kite launch from 44 stations in July 1908. Professor Rotch urged a common form for reporting kite data and suggested the form used at his Blue Hill Observatory (and at "Mount Weather"). The group agreed to exchange data on request, and to publish specifically in the Fortschritte der Physik, Germany, and the Monthly Weather Review, US.
Prof. Assmann described a new technique for creating balloons-sondes "by dipping a rubber solution instead of cementing sheets of rubber." The dipped balloons have fewer dust particles and can expand several times over as they asecnd without losing gas or bursting. Assmann suggests putting one balloon inside another.
Prof. Vilhelm Bjerknes recommended assays intended to take multiple readings at the same levels of atmosphere. He urged the need for absolute simultaneity (as opposed to local time) of the international observations in order to gain a clearer picture of the atmosphere as a whole system. And he recommended that observers should record gravity potential ("dynamical units") rather than height. 
Prof. Arthur Berson reported on an expedition to Lake Victoria Nyanza in East Africa. A steamer on the lake released ballons-sondes, pilot-balloons, and kites, which reached high altitudes and reported low temperatures. Prof. Luigi Palazzo of the Italian Meteorological Office, described an expedition to Zanzibar. Hergesell described a German expedition to the Canary Islands and the Peak of Teneriffe. 
- Prof. Wilhelm Travert, successor to Prof. Joseph Maria Pernter as head of Austrian Meteorological Office.
- Vinent, head of Belgian Meteorological Service
- Kleinschmidt, Lake Constance Kite-station
- Captain Ryder, director of Danish Meteorological Institute
- Prof. Bjerknes of Christiania
- Dr. Bamler, Munich
- Captain Voyer, French military
- Captain Bouttieaux, French military
- Le Clément de St.-Marcq, Belgian military
- Colonel Capper, British military
- directors of the Russian observatories at Irkutsk, Tiflis, and Ekaterinburg
Professor Hildebrandsson was named vice president.
- Robert Marc Friedman, Appropriating the Weather: Vilhelm Bjerknes and the Construction of a Modern Meteorology; Cornell University Press, 1989; pp. 67–68.
- Abbott Lawrence Rotch, "The Aerological Congress at Monaco", Science, 13 August 1909.
- Robert Marc Friedman, Appropriating the Weather: Vilhelm Bjerknes and the Construction of a Modern Meteorology; Cornell University Press, 1989; p. 69.
|Event names||Sixth Meeting of the International Commission for Scientific Aeronautics; Sixième Reunion de la Commission Internationale Pour L'Aerostation Scientifique|
|Number of days||7|
|Tech focus||meteo, LTA, instrument, balloon|