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Published online by Cambridge University Press: 14 August 2015
The meridianal surveys [1] at 21-cm. of interstellar hydrogen gas have been continued. Surveys at galactic longitudes of 50° [1], 60° [2], 80° [2], 90° [1], 110° and 200° have been completed while partial surveys have been made at longitudes of 20°, 205°, and 210°.