VESICULAR DISEASE CONTRACTED FROM SHEEP. 
469 
Typica 
Autiodactyla ( continued ). 
Camelus. 
Auchenia. 
Merycotherium 
Merycopotamus. ' 
Hippopotamus. 
Dichodon . 
Hyracotherium. 
Hyopotamus. 
Anthracotherium. 
Hippohyus. 
Choeropotamus. 
Dicotyles. 
Phacochcerus. 
Sus. 
— Magazine of Natural History. 
CLINICAL LECTURE ON A VESICULAR DISEASE CON- 
TRACTED EROM SHEEP. 
By George Burrows, M.D., F.R.S. 
I think, gentlemen, you are well aware that whenever an 
opportunity offers, I prefer taking for a clinical lecture a series 
of cases which will illustrate some particular disease. This is 
my object generally, by preference ; but when such a series 
of cases does not present itself in the wards, then I endea- 
vour to select some case of great rarity, or of great severity, 
the study of which may possibly enlarge your knowledge of 
disease in general. It will be to a case of this latter descrip- 
tion that I shall particularly invite your attention this morning 
There is, as you know, a large and very important class of 
diseases depending upon the introduction of an animal poison 
into the system ; and one striking feature of all such diseases 
is the appearance of an eruption upon the skin, accompanied 
with a peculiar kind of constitutional disturbance or distress. 
The animal poisons which are capable of producing such dis- 
eases are various ; and these poisons are sometimes generated 
by human beings, and sometimes by the low r er animals. The 
modes by which the animal poison may be introduced into 
the human system are also various. It may be introduced 
artificially or accidentally, sometimes into the blood-vessels, 
and sometimes into the tissue of an animal ; and the same 
poison may be introduced by the process of inoculation. I 
say the poison may be introduced in various ways : it may be 
in a direct manner, the poison being taken from one animal, 
