2 4 I 
largely made up of captured cattle, the majority of which probably 
came from the neighbourhood of Lake Kivu. 1 he cattle are at 
present in splendid condition. Since 1900, 45 calves have been born. 
Dunng the same period there have been only five deaths, none of them 
from any disease resembling trypanosomiasis. 
The country surrounding Nvangwe is high, grassy plain. 1 he 
herd never grazes further than one and a half miles from the post 
and never goes near a swampy area towards the South. 1 he countiy 
about Nyangwe is thickly populated and extensively cultivated. There 
is, therefore, little large game in the neighbourhood. Tsetse flies 
were not seen anywhere about the post nor on the plains wheie the 
cattle graze. They were seen, however, along the river bank a mile 
and a half further South. 
The blood of 20 cattle chosen because they were less plump than 
the remainder of the herd was examined ; gland puncture was done 
m 17 in which the glands were sufficiently large. I rypanosomes 
were not found. 
Kasongo, November 25th, 1904 April 2/th, i 9 ° 5 - rliere 1S a 
herd here of about 260 cattle. Many of them were collected by the 
Arabs; additions have been made by the whites. The animals 
reproduce well and the herd has been largely increased by local 
births; deaths from diseases are very rare. Its original members 
were probably largely from Lake Kivu. Some probably came fiom 
the Eastern and Southern shores of Lake 1 anganyika. A ei > ^ ev '’ 
any, were ever brought directly from Katanga, far to the South, or 
from Lusambo, in the West. 
One hundred of the cattle were examined for trypanosomiasis 
during our stay at Kasongo, five were found to be infected. All fi' e 
"ere found in the first twenty-two examined. 'I Ins is noteworthy, 
Slnce the thinnest animals were taken first. All the animals weie 
examined in the same way and each was gone over but 
Preparations of gland juice and blood were examined and the 
temperature was taken in each case. . 
The infected animals were kept under observation for se\ 
months. The rareness with which parasites were seen in them 1 g 
th,s Period (see charts) strongly indicates that many cases remained 
^detected by our examinations, and therefore that the proportio 
ca hle infected is much more than five per cent. 
