SEAT AND NATURE OF GLANDJUIS. 283 



sumes, we are inclined to believe Dupuy's pathology to be the 

 correct one. Next to the head, we find the lungs taking on the 

 disease ; not by direct extension of the morbid action to them 

 through the medium of the windpipe and its branches, but — as we 

 suspect — from the continual inhalation of the glanderous effluvia 

 arising from the diseased surfaces in the nasal cavities and sinuses, 

 as well as from the malignant matters lodged within them ; at the 

 same time, the general contamination of the system not being with- 

 out its influence. The lungs, however, do not prove diseased in 

 all cases of glanders. In such subjects as exhibit the disease in its 

 acute form, and wherein death, resulting from suffocation, is sud- 

 denly or quickly produced, the lungs — unless they might happen 

 to have been already in a state of disease — are commonly found in 

 a perfectly normal state. The consideration of these contingencies, 

 upon which the condition, sound or morbid, of the lungs appears to 

 depend, will serve to reconcile the wide differences of opinion that 

 have been promulgated concerning them: some contending that the 

 lungs always were found diseased in glandered horses; others, 

 that they hardly ever were, or were only so in cases in which dis- 

 ease had previously existed in their own structure. 



Another, and by no means an infrequent, seat of glanders is the 

 larynx. The glottis takes on the specific inflammation and thick- 

 ening, and ultimately breaks forth in a state of ulceration, manifest- 

 ing all the characters of the glanderous chancre; and, with his la- 

 rynx in this condition, the horse turns roarer, though this is an 

 effect that is not often discovered, unless the animal happens to be 

 at the time at work. In the stable, I have never observed any 

 great inconvenience arise from this ulcered condition of the larynx : 

 a circumstance, probably, the chronic or inactive nature of the ulcer- 

 ation will serve to account for. 



T have seen ulceration within the windpipes of glandered horses; 

 but it is an occurrence which I believe to be exceedingly rare, not 

 within the main tube only, but within its ramifications as well. 

 There does not appear to exist the same susceptibility in the por- 

 tion of the aerial membrane lining these tubes as in other parts 

 of it — as even in those divisions of it constituting or lining the 

 pulmonary air-cells. 



