Publications of the Astronomical Observatory of the University of Michigan

A large reflecting telescope of the Cassegrain form, having an aperture of 37.5 inches and an equivalent focal length of 60 feet, was designed and constructed at the Astronomical Observatory of the University of Michigan. More than 3700 spectrograms have now been made, and nearly all the papers in Publications of the Astronomical Observatory of the University of Michigan are based upon data obtained from a small portion of the spectrograms.