“…Examination of blood samples lacking Hb A: A variant of foetal haemoglobin, provisionally designated Hb "Acgina" (10) which cannot be separated from Hb A at pH 8.4 suggested the possibility that cord blood haemoglobin may contain other minor fractions, whose presence is obscured by Hb A. This latter difficulty may be circumvented by subjecting to starch gel electrophoresis haemo globin solutions devoid of the latter Hb.…”