Vlll 



Contents. 



CHAPTER PAGE 



Muscles - - ^ - - - 78 



Ligaments - - - - - 80 



Mucous Membrane - - - - 80 



Nerves - - - - - - 81 



The Larynx as a whole - - - - 85 



Physiology of the Larynx - - - - 90 



VII. PATHOLOGY AND COURSE OF CHRONIC ROARING - - 99 



Course of Roaring - - - - - 104 



VIII. CAUSES OF CHRONIC ROARING - - - - 110 



Mechanical Causes - - - - 110 



Pathological Causes - - - - 115 



IX. PREVENTIVE AND CURATIVE TREATMENT OF CHRONIC 



ROARING ------- 128 



1. Prevention, from a Sanitary Point of View - 128 



(a) Exclusion of Unsound Horses for Breeding 



Purposes - - - - - 129 



(&) Care in the Management of Young Horses - 129 



(c) Hygienic Management - - - 130 



2. Medical and Surgical Treatment of Roaring - 132 



[a) Medical Treatment of Roaring - - 133 



(6) Surgical Treatment of Roaring - - 135 



X. THE OPERATION FOR ROARING - - . - 140 



1. Operation - - - - - 140 



2. After-Treatment - - - - 156 



