Published online by Cambridge University Press: 30 March 2016
A Michelson interferometer was put into operation during the year 1972 at the Coudé focus of the Haute-Provence Observatory’s 76-in. telescope. We built this instrument at Aimé Cotton Laboratory (Orsay-France) where the method of Fourier Transform Spectroscopy has been largely developed in the direction of very high resolution work. A complete description of this device has been given elsewhere (Guelachvili and Maillard, 1970) and further details on the present study are reported by Maillard (1973).