Pediatricians, nutritionists, and others interested in human growth and development who have been using the first two volumes of this valuable work since 1942 will eagerly welcome Volume III. Those who are familiar with this unique study, from the Research Laboratory of the Children's Fund of Michigan, are well aware that the first two volumes are a treasure house of metabolic information. Eleven carefully selected normal children from 4 to 10 years of age, living under ideal conditions for accurate balance studies of energy, fat, nitrogen, and a number of minerals and other foodstuffs, were observed for a 95-day period. Four years later 11 subjects from 55 to 104 months of age were observed for 225 days, and, again, four years later 7 of the same subjects, 6 boys 103 to 146 months of age, and 1 girl 110 months of age returned for 55 days of additional study.
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