Astronomers invited

Kitt Peak National Observatory has announced the availability of new facilities for the use of visiting astronomers. The equipment includes: an 84‐inch stellar telescope with an f/7.6 Cassegrain camera and a photoelectric photometer and the McMath Solar Telescope (f/60, 300‐foot focal length), also useful for planetary and lunar observations. A Coudé spectrograph (dispersions of 2 to 24 angstroms/mm) and a Cassegrain spectrograph (dispersions of 40 to 400 angstroms/mm) are expected to be in operation soon in conjunction with the stellar telescope. Visitors may also utilize sounding rockets for astronomical observations. Further information is available from the Office of the Director, Kitt Peak National Observatory, PO Box 4130, Tucson, Arizona.