Abstract
The physiologic functions of the nasal cavities are as follows: They elevate the temperature of the inhaled air, give it moisture, and purify it by arresting all particles of dust and other substances which it may contain; they act as resonance cavities for the voice and are also the seat of the sense of smell. A professional experience of more than twenty-five years, has taught me that any inflammatory lesions-found in children between the ages of 4 and 12 years-which obstruct these natural conditions, are in the majority of cases, the chief agents in the causation of malformed jaws, and the consequent abnormal alignment of the teeth. (To the same cause can be attributed beaked or hooked noses, so often found in connection with these deformities.) I have reached this conclusion after many years of ceaseless endeavor to trace out cause and effect. Others may theorize differently, but theory alone
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