TREATMENT. 465 



serving of a trial, and in some instances is superior to the 

 liquid applications. Such agents as iodine and sulphurous 

 acid may be employed in the form of vapour by sprinkling 

 the solution of either over warm, moist hay or bran contained 

 in a nose-bag. They may also be employed in the liquid form 

 through means of the ordinary spray-distributors. In the 

 form of an impalpable powder, iodoform compound, iodine, or 

 carbolic acid, either of the latter being mixed with a fine 

 powder, as ground liquorice-root, may be driven up the nostrils 

 once or twice daily by means of an indiarubber ball attached 

 to a small tube known as an insufflator. This method of local 

 stimulation I have seen attended with much good. 



All cases of chronic nasal catarrh which do not improve 

 under a short course of treatment such as we have indicated, 

 are probably dependent for the continuance of the discharge 

 on extension of the lesions to the mucous cavities having con- 

 nection with the nasal chambers. 



Disease of these contiguous cavities, the sinuses of the head 

 and face, with the posterior mucous pouches peculiar to 

 solipeds, although possessing as a prominent symptom a cha- 

 racteristic nasal discharge, belong more properly to the domain 

 of surgery proper. 



CHAPTER XYII. 



DISEASES OF THE LARYNX. 



I. Acute Laeyngitis — Laryngo-Pharyxgitis — Sore Throat. 

 Definition. — Inflammation of the soft tissues and mucous 

 membrane of the larynx. 



Inflammation of the larynx pure and simple must, we sus- 

 pect, be of much less frequent occurrence than a combined 

 and more general morbid action involving the contiguous 

 structures which enter into the formation of the cavity 

 common to both food and air tubes, the pharynx. 



As affecting the larynx chiefly, or to a greater extent than 

 contiguous parts, we are acquainted in the horse with the 

 appearance of inflammatory action in at least two forms — 

 1. AciUe Catarrhal Laryngitis ; 2. (Edematous Laryngitis. 



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