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9 Commission des Instruments Astronomiques

  • M. Ch Fabry (a1), M. H. Chrétien (a2), MM. Anderson, R. Baillaud, Calder, Mme Chandon, MM. Couder, Danjon, de la Baume Pluvinel, Delvosal, Dufay, Horn d’Arturo, Moll, Ritchey, Sampson, Schilt and Svoboda...

Extract

La commission vient de perdre l’un de ses membres les plus actifs dans l’élaboration et la construction des instruments. Le Dr F. G. Pease est décédé le 7 février 1938, après une très courte maladie qui l’emporta en quelques jours.

Mme Ed. Chandon suggère que la commission étudie systématiquement, aux divers points de vues des observations astronomiques, l’œil, cet instrument auquel tous les autres aboutissent et aux imperfections duquel ils doivent remédier.

L’œil est un instrument multiple. Ses qualités photométriques et colorimétriques jouent un rôle fondamental dans les observations des étoiles variables. Comme instrument de coïncidences, l’astigmatisme qu’il peut présenter n’intervient pas de la même manière dans les observations des passages, dans les mesures des hauteurs, etc.

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