XLIV INTRODUCTORY. 



4. Considerable unevenness and depression of the cranial bones. 



5. Incurable caries of" the cranial bones. 



b. — Auditory organs. 



1. Loss of the external ear, if the sense of hearing be at the same time impaired. 



2. Malforaiations and tumors, of Avhatever nature, on the external ear, if inteifering to 



a considerable degree with the function of hearing. 



3. Imperforate auditory canal in one or both ears. 



4. All forms of purulent otorrhcea, with perforation of the tympanic membrane, if the 



seat of the disease be in the middle ear. 



5. All chronic pathological conditions of the middle or internal ear, accompanied by 



deafness or considerable disturbance of the function of hearing. 



c. — Face. 



1. Habitual convulsive or spasmodic contractions of the facial muscles to such a degree 



that the faculty of speaking is interfered with. 



2. Considerable deformity of the face, through acquired or congenital malformation or 



incurable exanthemata. 



3. Incurable salivary fistula. 



d. — Ei/es. 



1. Chronic inflammation of the margin of the eyelid of one or both eyes, with its con- 



sequences, viz : permanent hypertrophy and induration, or cicatricial deformity 

 of the margins of the eyelids with incurable loss of the greater part of the cilia. 



2. Entropion and ectropion of one or both lids in all grades or forms ; partial or total 



adhesion of the lids to each other or to the eye-ball ; large, unsightly tumors 

 on one or both lids, interfering with theii' mobility ; paralysis of the motor 

 muscles of the eyelids of one or both eyes ; if all these infirmities be incurable. 



3. Chronic lai^hrymal blennorrhoea, and swelling of the lachrymal sac ; lachrymal 



fistula ; habitual, incurable effusion of tears to a considerable extent, caused 

 by any organic disease whatever. 



4. Strabismus of the right eye, in any degree ; considerable strabisnuis of the left eye ; 



oblique position of one or both eyes; nystagmus; exophthalmia of one or both 

 eyes. 



5. Extensive cicatricial disfigurement of the conjunctiva ; extensive trachoma. 



6. Cicatrices or spots on the cornea, of one or l>otli eyes, if covering part of a 



moderately-dilated iris, whether dense, tendinous, cloudy, or diff'used. 



7. Staphyloma of the cornea and iris, of any form or extent ; staphyloma sclerotica, 



cirsophthahnia, and hydrophthalmia. 



8. Distortion of the right pupil, originating from any cause whatever; synechia, 



anterior or posterior, if more than one-half of the iris be implicated ; atresia 

 of the pupil of one or both eyes ; congenital fissure of the iris ; cicatrices, or 

 partial separation of the iris from the ciliary ligaments. 



9. Gray cataract, in any of its stages ; absence of one or both lenses, occasioned by 



previous operation or by accidental injur\'. 



