This investigation is one of a series undertaken to determine the response of bone growth in children to an improvement in nutrition. Ossification in the bones of the wrist has been the criterion of bone development; several food supplements have been used to improve nutrition. The effect of the daily addition to an institutional diet of a pint (473 cc.) of milk, plain or irradiated, was described in a previous article.1 The present report concerns the effect of another supplement, cod liver oil.
The plan in the several studies was to find out under experimental conditions whether the rate of ossification would be modified by a dietary supplement in a group of children who were considered an average sample and who were receiving average diets. The striking effect of some specific supplements in cases of obvious deficiency diseases, such as rickets, is well known. As quality of bone may be