40 Roaring in Horses. 



and as we shall presently show, to develop those maladies 

 which so frequently lead to Roaring. 



According to Charon,^ Roaring is frequent in the West 

 of France, and more especially in the Norman Depart- 

 ments of La Manche, Orne, and Calvados ; while it is less 

 frequent in La Vendee, is almost unknown to the south 

 of the Loire, and is still more rare from the banks of the 

 Garonne to the Pyrenees. Normandy has always been con- 

 sidered the country in France in which the defect is most 

 common and has been longest known. Indeed, there is a 

 Norman tradition that the name by which it is known in 

 France — " Cornage " — originated there, and was carried, 

 along with the horses of La Manche and adjoining depart- 

 ments, into the interior ; it was derived from the similarity 

 of the sound emitted by the affected horse to that given 

 out by the horn of the cowherd assembling his cattle. 



Ireland is a moist country, more so than England, and 

 the affection is more common in Irish than English horses, 

 so far as my experience goes. 



Change of climate may also act as a predisposing, or even 

 exciting cause, as witness the case of English troop-horses 

 in Egypt and South Africa, and Irish horses brought to 

 England. An Arab recently imported from India to this 

 country has become badly affected with Roaring. 



Climates which predispose to diseases of the respiratory 

 organs are those in which Roaring is most prevalent ; such 

 are cold, moist climates ; and those in which it is least 

 known are warm and dry climates — maladies of the air- 

 passages being rare in them, and horses living much in the 

 open air. Under the influence of acclimatization in moist, 

 cold climates, horses bred in warm, dry climates become pre- 

 disposed, through the diseases common to such inhospitable 

 regions attacking them and rendering them liable to this 

 defect. 



1 Op. cit., p. 77. 



