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Economical poultry flock management requires early selection of those individuals that are to be used for flock replacement. The weight of the individual is considered of primary importance in this selection. A study of the variations in growth and their relationship at different ages should improve the available knowledge in regard to early selection. A measurement of variation in growth should also prove valuable in future investigations.REVIEW OF LITERATURE Very few studies of this nature have been made and these involve only Single Comb Rhode 15, 1928) report growth curves of Single Comb Rhode Island Reds. In summarizing they state that a period of high variability in live weight was observed. This period was between 0 and 7 or 8 weeks of age for those receiving skim milk and 0 and at least 12 weeks of age for those not receiving skim milk.Henderson, D. C, (POULTRY SCIENCE, Vol. VII, No. 4, May 1, 1928) reports on the relation of the weight of Rhode Island Red pullets at four weeks to their subsequent rate of growth. The coefficients of correlation were all very significantly positive. He concludes, "The variation in weight of chicks relative to the mean weight remains nearly constant from four to sixteen weeks. The correlation of the weights of female chicks at four weeks and the weights at eight, twelve and sixteen weeks are positive and show that the chicks that are relatively large at four weeks are relatively large at eight, twelve and sixteen weeks, respectively. "

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During attempts to determine the riboflavin requirement of poults, in which both simplified and commercial type rations were used, dermatitis occurred regardless of the riboflavin intake. Jukes'