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9. Commission des Instruments Astronomiques

  • M. Ch. Fabry, M. Bianchi, Mme Chandon, MM. Chrétien, Couder, de la Baume Pluvinel, Delvosal, Hamy, Merfield, Moll, Moreau, Nechvíle, Nušl, Pease, Ritchey, Sampson, Schilt, Tinoco and Van Heel...

Extract

Matériaux. La fabrication de grands disques de quartz a été poursuivie aux États-Unis; mais aucun résultat n’a encore été communiqué à la Commission.

Mlle Clavier, de l’Observatoire de Paris, a étudié des miroirs en acier inoxydable, taillés, polis optiquement et argentés. Deux points d’ordre chimique restaient à élucider pour rendre pratique l’emploi de cette matière: (a) l’argenture, qui ne donnait jamais de couches bien régulières et adhérentes; (b) l’enlèvement de l’argent terni, en vue d’une argenture nouvelle.

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