306 Report on an Inquiry into the Nature, Causes, and 
observed that cases are especially prevalent when horses arc 
allowed to graze on, or are tethered out, in wet grass. 
The onset is usually sudden, with dulness, loss of appetite, 
rise of temperature, injection of the conjunctivae, accelerated 
breathing, cough, and other symptoms, resembling those of 
inflammation of the lungs. There is evidence of considerable 
exudation in the bronchi, and in some cases a large quantity of 
mucus is discharged from the mouth and nostrils. The tempe- 
rature is usually considerably elevated, reaching 105° to 10b° 
Fahr. In one form of the disease there is great swelling of the 
tongue and of the cellular tissue of the throat, causing death by 
suffocation. 
The disease is usually fatal, sometimes in a few hours, more 
rarely in two or three days, and cases of recovery are on 
record. 
The post-mortem examination shows usually rapid decom- 
position. There is often a quantity of straw-coloured fluid in 
the pleura ; the lungs are engorged, and along the margin and 
in patches beneath the pleura is a large quantity of yellow 
lymph. On section of the lungs, blood and serum flow freely 
from the cut surfaces, and frothy yellow mucus from the 
bronchi. 
Ecchymoses are invariably found beneath the endocardium of 
the left ventricle, the heart is soft and flabby, and there may be 
serous effusion in the pericardium. 
The following account of a case of this disease, for which I 
am indebted to Mr. R. Moore, M.R.C.V.S., gives a good illus- 
tration of the symptoms and post-mortem appearances which are 
usually observed. Material was sent to me for examination : — 
" The horse had been doing very little work, and was in 
good condition. He was noticed to be dull in his work the 
day before he was taken ill. He was first noticed to be ill at 
3 o'clock P.M., and was seen by me at 6 o'clock the same 
evening, when he was presenting the following symptoms : 
Temperature at the mouth very high ; pulse imperceptible ; 
visible mucous membranes highly congested and of a livid 
hue, especially round the gums ; breathing very laborious ; 
extremities and surface of body cold ; crepitation in all parts of 
both lungs on auscultation. At 9 P.M. the characteristic dis- 
charge of froth issued freely from the nostrils, and he expired 
about 10 P.M. 
" Post-mortem Examination. — Body in good condition ; flesh 
dark in colour. 
" Chest. — Large accumulations of lymph in patches in the 
areolar tissue on the surface of the lungs and pericardium. 
Both lungs large in appearance, but not of a very dark colour. 
When cut, they presented great capillary congestion, which 
