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The interdependence of medicine and a large number of the natural sciences is being recognized more forcibly today than it was a few years ago. To cite a single illustration, it is not long since entomology was regarded as something quite foreign to the practice of medicine; but the growing recognition of the very important rôle of insects in the transmission of disease has created a demand for detailed information of the life habits of various species, such as the mosquito, the fly, the body louse and the flea. Instances of this sort could easily be multiplied. It is in harmony with these modern mutual relationships in science that the work of the U. S. Department of Agriculture has frequently been of immediate interest to the medical world. Indeed, this is true to an extent which the casual observer might not easily suspect; for various activities of the department, such
THE STATES RELATIONS SERVICE. JAMA. 1915;LXV(23):2013–2014. doi:10.1001/jama.1915.02580230055021
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