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Published online by Cambridge University Press: 04 August 2017
A variety of observations of molecular clouds outside the solar circle (mostly around R = 14 kpc) are reported. Maps of CO, 13CO (J = 1 → 0) and CO (J = 2 → 1) emission are discussed. Cloud sizes and masses range up to the GMC class. However, envelope kinetic temperatures are lower than those in GMCs in the molecular ring. Continuum observations, using the VLA at 6 cm and 20 cm, and far infrared observations, taken on the Kuiper Airborne Observatory, suggest the presence of newly formed late O and early B stars.