240 oze:n^a. 



are covered with the mucous membrane common to the mouth 

 and the windpipe, and through which the air passes in its way 

 to the lungs. 



The annexed engraving (after a photograph taken from a 

 dissection made by Mr. Greaves, Y.S., of Manchester,) will 

 perhaps exhibit the seat of the malady more clearly than I can 

 state it to the reader by the use of words alone. 



Fig. 18. 



Fig. 18 represents a section of the liead of the horse. The reader is to 

 suppose the head to have been di\dded into two halves ; and he must also further 

 suppose that he is regarding the inner surface of the right half; also, that a 

 considerable portion of the Septum Narium (d) has been removed, in order to 

 show the turbinated bones. 



a The Ethmoid Bone of the right side of the head, showing the ceUs or 

 cavities into which it is divided. 



hh The superior and inferior Turbinated Bones of the right side. 



c The Cranial Cavity wherein the brain is lodged. 



d The Septum Narium, or the cartilage which divides the nostrils from 

 each other. 



e The Molar Teeth. 



f The Frontal Sinus situated at the top of the nose. 



g Fhe posterior portion of the Cranial Cavity, where the cerebellum is 

 lodged. 



7i The Palate, or the roof of the mouth. 



The convex surfaces of the superior and inferior turbinated 

 bones of the right side of the head ; also the surface of the 

 ethmoid bone, and its numerous cells of the same side, are 

 accuratelv delineated. 



