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Published online by Cambridge University Press: 27 March 2009
1. Experiments are described in which the riboflavin contents of the liver, kidney, heart and leg muscles of chicks were assayed during the first few weeks after hatching, using birds reared on both riboflavin-deficient and riboflavin-adequate diets.
2. Changes in the composition of the liver during the first 3 weeks after hatching have been studied.
3. At hatching, half the chick's liver consists of oil; this proportion is maintained during the first week, but falls to about one-eighth during the second week and maintains this level during the third week.
4. When birds are reared on a riboflavin-deficient diet, the riboflavin concentrations of the heart and kidney are reduced more rapidly than that of the leg muscles.