Although it is possible to control the weight of the body by diet and exercise, it is an everyday observation that some persons grow fat while eating relatively small amounts of food and apparently without relation to the amount of exercise they take. Others remain slender while consuming large quantities of candy, cream, milk, butter. Scientists are convinced that the body build is controlled to a considerable extent by heredity and other factors, such as some governing influence in the cells.
The eugenics record office of the Carnegie Institution in Washington has...
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