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Department of Chemistry, Columbia University, New York City
The complete life cycles were studied in 70 and 69 males and 103 and 105 female rats on two comparable diets, one differing from the other by the addition of fresh meat and green beans to the dry diet. The criteria which were used afforded measures of the efficiency of the diets in relation to growth and development, adult vitality, and length of life.
The addition of fresh meat and green beans was found to result in more rapid early growth, attainment and maintenance of larger adult size, and earlier maturity. It also prolonged very slightly the period of adult vitality as measured by the ability of the females to bear young. It did not significantly influence the length of life.