| Introduction | | Purpose of the Study. | 5 | | | Chapter I. | 7 | | Previous Literature Concerning the Relation of Nose and Throat Defects to Intelligence. | | | Chapter II. | 24 | | Method and Procedure. | | 1. A Statistical Study. | | 2. A Study of Improvement After Treatment. | | Selection of Cases. | | The Tests. | | | Chapter III. | 29 | | Discussion of the Results. | | 1. The Statistical Study. | | 2. The Study of Improvement after Operation. | | | Chapter IV. | 53 | | Measurement of Improvement after a Second Interval of Six Months. | | | Chapter V. | 68 | | Summary. | | Conclusions. |
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