The present text-hook of otorhinolaryngology is intended for secondary medical schools and gives the most essential theoretical and practical information needed by the junior medical personnel engaged in independent practice.It is calculated to enable the junior medical personnel, employed as assistant physicians in medic"al institutions or working on their own, to diagnose typical diseases of the ear, nose and throat, prescribe and give correct treatment, and if need he, render first aid to the patient.Before discussing the clinical aspects of diseases of the ear, nose and throat, we deem it necessary to give a con- cise description of the anatomy and physiology of these organs, which should considerably facilitate the clinical study.Special attention is devoted to early diagnosis of ear, nose and throat diseases, which is very important for both treatment and prophylaxis.