The report4 of the investigation that has been carried out by Drs. Park and Holt, under the auspices of the Rockefeller Institute for Medical Research, on the use of pure and impure milk among tenement children in New York City, is worthy of careful study. The outcome of the inquiry illustrates the extreme complexity of the conditions surrounding infant feeding and the importance of approaching the matter without preconceived opinions. In some respects the report may be held to emphasize an aspect of infant feeding that has not always been put to the fore in discussions. The importance of carrying out investigations of this character under actual tenement-house conditions rather than in institutions, or among the homes of the well-to-do, is shown by the remarkably concordant character of the results obtained through the co-operation of a considerable number of workers along clinical and bacteriologic lines.
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