Three distinct disorders are herein named: first, chronic inflammation of the nasal mucous membrane; second, atrophy of the turbinals and their associated mucous membrane; third, necrosis of the bones entering into the framework of the nasal chambers. _(a)_ Inflammatory thickening is a rare affection. It is more frequent in males than in females, and in persons of a sedentary occupation than in those who are actively employed. Those subject to it are apt to have light-blue or gray eyes and auburn or sandy hair. On examination, the chambers may be found free from peculiarities of bony structure, capacious, and without hypertrophy of the cavernous tissues, yet the membranes be of a deep-red color and of cushiony consistence, yield bright reflexes, and the shank of the instrument introduced into the nose is mirrored upon them. The most conspicuous alteration is not seen on the turbinals, but on the septum. The parts are very vascular, and the most moderate manipulation will often end in free capillary oozing. The discharge, though moderate in quantity, is inclined to be purulent, and resembles semi-coagulated albumen. Quite frequently, in the examination of a neglected case, minute flecks of this modified secretion are seen scattered over the septum and the inferior turbinated bone. Rarely, the discharge is maintained by the presence of a morbid growth or inflammatory products, either in the nasal chamber or a chamber accessory to it. The discharge then appears to consist of pure pus mixed with the normal secretion of the nose, and, thus rendered viscid and tenacious, it excites by its presence a condition of the lining mucous surface quite similar to that above described. {47} Under excitement, as after an attack of coryza, the discharge becomes more serous in character, and is occasionally of a chocolate color from its admixture with blood. It is without odor. There is no obstruction to respiration except during sleep, when, in aggravated cases, mouth-breathing may be established. Thus, the patient will often complain of an obstruction which is never present at the time of the examination. He further complains of a sense of dryness in the nose, with some pharyngeal irritation. The palato-pharyngeal and palato-glossal muscles are weak and often asymmetrical; the tonsils are small, but the adenoid tissues are generally unaffected. In a dry atmosphere, especially if it be loaded with irritating particles, the pharyngeal irritation is increased--a complication which is probably due to the inspired air passing too rapidly through the capacious and imperfectly-guarded nasal chambers and throat. Although I have carefully searched for all indications of aural complications, especially for the symptoms of progressive dry catarrh, I have never detected them but in a single instance. The prognosis is to be guarded, although a careful course of treatment and proper care of the general health will greatly improve, if not entirely cure, the disease.