The accurate picture of the acidophil granules of the anterior pituitary which is provided by iron hematoxylin can be combined with the differential staining of the basophils by either the periodic acid-Schiff (PAS) or combined aldehyde-fuchsin-PAS procedures. To accomplish this the two stages of the iron hematoxylin technique are separated so that mordanting in iron alum precedes and application of hematoxylin follows the basophil procedures.
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Herbert Elftman (1960) studied this question.
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