304 THE PRESENT EPIDEMIC AMONG CATTLE, &c. 
have died, had they not been suckled by a ewe with the disease at 
birth. Many have taken away the lambs after they are dropped, 
and before they had any opportunity of sucking the ewe. They 
have fed them with milk from the healthy cow and linseed infu- 
sion, yet they have died about the same time. Lambs also that 
have dropped from ewes not having the disease have died in the 
same manner. From this I have drawn the conclusion, that the 
milk of the ewe has poisoned the young ones in the first place ; 
secondly, if they received it from a natural cause, they also die 
from the suppression of the disease, in consequence of the con- 
stitution not possessing sufficient vigour to allow it to develop 
itself either in the feet or mouth. I am now stating undeniable 
facts from actual observation; for in numerous cases, where the 
young animals, when only a few days old, have had the distemper 
in the feet or mouth, they have done well; but when the malady 
has not been externally visible they have died. Lambs dropped 
from those ewes not having the disease at their birth, die also if 
the distemper is among the flock. 
My friend Mr. Hainwood, of Longbarn, an accurate observer, 
had a sow that farrowed and brought forth a litter of ten pigs. 
The sow at their birth had the epizootic. The little ones sucked, 
looked well, plump, and glossy, and full of their gambols, but on 
the fourth day seven died in a few hours. No premonitory symp- 
toms were observed. On the fifth the remaining three died also. 
I will now briefly describe the morbid appearances observable in 
many lambs examined by me and sent from the flocks of different 
farmers. The intestines, kidneys, and bladder, in fact the whole 
contents of the abdomen, were healthy. In some the lungs, costal 
pleura, as well as pulmonary pleura, had an unnatural sanguineous 
blush, and also the pericardium; but, in the majority of cases, 
the cerebral tunic was turgid, with an evident determination of 
blood to the brain, yet no effusion either in the ventricles or on the 
surface ; the commencement of the spinal sheath was also blushed 
in some; but the most singular appearance was the milky white 
nebulosity of the crystalline lens of the eyes. In some of the 
lambs that died of the epizootic malady, commencing, on carefully 
examining the lens, a little before death, the humours of the eye 
are healthy and transparent, but the opacity is entirely confined 
to the crystalline lens of the eye. Reasoning from this symptom 
and those before described, it is a fair conclusion that, where 
the distemper is not fairly brought forward, the brain or its 
investment is the seat of the disease, either from its structure in 
young animals being more susceptible of the impression of the 
poison, or because they have not sufficient vigour to allow the 
disease to be brought out either in the feet or mouth. 
