title: Poses de longue durée avec un spectrographe à réseau réseau de haute résolution.
abstract: It is shown how a large conventional spectrograph may be used for very long exposures specially in the study of molecular spectra, thanks to a pressure-compensating device.
authors.forename: R
authors.initials: R
authors.lastname: Bacis
authors.forename: B
authors.initials: B
authors.lastname: Fémelat