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Published online by Cambridge University Press: 14 August 2015
Radio-astronomical observations of the annular eclipse of 1958 April 19 (η = re/r⊙ = 0.939, ϕ = 18°14′34″.08, λ = −7h18m 01s.86) were especially interesting since this year was, apparently, the year of maximum solar activity. Some preliminary results of the observations carried out by a joint expedition of the Soviet and Chinese Academies of Sciences, equipped with seven radio telescopes, are described in this report.