11. Commission des Phénomènes Chromosphériques

Au cours des trois années 1932,1933 et 1934, les relevés et statistiques habituels des flocculi, des protubérances et de l’épaisseur de la chromosphère, ont été poursuivis et publiés régulièrement. Ils se répartissent de la manière suivante:</jats:p

II. Commission des Phénomènes Chromosphériques

La Commission vient de subir une lourde perte en la personne de George Ellery Hale, Directeur honoraire de l’Observatoire du Mont Wilson, décédé le 21 février 1938, à l’âge de 70 ans.L’enregistrement des phénomènes chromosphériques qui sert de base aux relevés et statistiques publiés régulièrement par divers observatoires, a été poursuivi sans changements notables depuis le dernier congrès. Le tableau reproduit dans Trans. I.A.U. 5, 59, 1935 et dans lequel sont groupés les renseignements relatifs à ces travaux d’observation courante, est donc toujours valable.</jats:p

12. Commission de Physique Solaire

The president calls attention to the large and increasing membership of Commission 12 and the policy of concentrating in it all matters relating to the sun. The result makes it comparable in breadth of field and in membership to the former Union for Co-operation in Solar Research. The main point in favour of this policy is the increased interest in the meetings of the Commission and the larger number of individuals reached compared with the meetings of small committees. One recalls the general sessions of the Solar Union in which each one present felt himself a part of the Union and in real touch with the work of different sections and after the discussions went away with fuller knowledge of what it was all about. This was a valuable result not attained to the same degree from the general sessions of the present Union, but in a measure it does follow from the meetings of the Solar Physics Committee. On the other hand the question may be raised whether or not the merging of independent commissions into subdivisions of a large commission lessens their interest to an extent not balanced by the advantages. If the present policy holds, it seems to the president that a re-organisation of Commission 12 is advisable by which more responsibility is laid upon the directors of centres. The basis of membership in the Commission may well be considered and recommendations formulated for transmission to the Executive Committee.</jats:p