HORSE-SICKNESS. 
57 
as it would do of a troop of fifty horses. This barrier 
then, sooms to explain the absence of the horso among tho 
Hottentots, though it is not opposed to tho southern migra- 
tion of cattlo, shcop, and goats. 
When the flosh of animals that have died of this disease 
is oaten, it causes a malignant carbunclo, which, when it 
appoars over any important organ, proves rapidly fatal 
It is moro especially dangerous over tho pit of tho stomach. 
Tho effects of tho poison have boon experienced by mis- 
sionaries who had eaten properly-cooked food, — tho fiosh 
°f shoop really but not visibly affected by the disease. 
Tho virus in tho flosh of tho animal is destroyed neither by 
boiling nor roasting. This fact, of which wo have had innu- 
merable examples, shows tho superiority of experiments on 
a largo scale to thoso of acute and able physiologists and 
chemists in tho laboratory; for a woll-known physician of 
Paris, after careful investigation, considered that tho virus 
in such casos was completely neutralized by boiling. 
This disease attacks wild animals too. During our re- 
■ldenco at Chonuan, great numbors of tolos, or koodoos, 
wore attracted to the gardens of tho Bakwains, abandoned 
at tho usual period of harvest bocause there was no pros- 
pect of tho corn ( IIolcus sorghum ) bearing that year. The 
koodoo is remarkably fond of tho groon stalks of this kind 
°f millet. Free feeding producod that state of fatness favor- 
able for tho development of this disoaso, and no fewer than 
twonty-fivo died on tho hill opposito our house. Great 
numbers of gnus and zebras porishod from the same causo ; 
but tho mortality producod no sonsiblo diminution in the 
numbers of tho game, any moro than tho deaths of many 
of tho Bakwains who persisted, in spito of every remon- 
•tranco, in eating tho dead moat, caused any sonsiblo de- 
crease in tho strength of tho tribo. 
Boforo wo camo to tho Orange River, wo saw tho last 
Portion of a migration of springbucks, ( Gazella euchore, or 
fcepe.) They camo from tho groat Kalahari Desert, and, 
’rhea first seen aftor crossing tho colonial boundary, are 
