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Published online by Cambridge University Press: 14 August 2015
NGC 6067 is a very rich cluster free of nebulosity in the Norma Cloud, whose colour-magnitude array has been published by Thackeray, Wesselink, and Harding (1962). The choice of stars for measurement was highly restricted to a square approximately 10′ × 10′ of arc near the centre, so that above B = 13·0 only 10% are expected to be field stars, and between B = 15·0 and 16·0 some 20–30%.