205 
Experiment 40.— Guinea-pig. From December 8, 1903, to June 9, 1904, 552 
flies were fed. The animal's blood was examined regularly until October, 1904 ; 
it died on June 3, 1905, of pneumonia. No trypanosomes or signs of trypano¬ 
somiasis were seen at the autopsy. 
River Series. 
Experiment 128a.—Monkey ( Cercopitheeus schmidti).* On June 24, 25, 26, 
1904, 25 flies caught at Mswata were fed on this animal. Its blood was examined 
regularly until September, 19*14, when it died of dysentery ; trypanosomes were not 
seen (malaria present |. 
Experiment 129.—Monkey ( Cercopitheeus schmidti). I rom June 27 to July ,, 
1904, 262 flies caught at Mswata and at the sleeping sickness hospital at Coquilhat- 
ville were fed on this animal. Its blood was regularly examined, but trypanosomes 
were never seen ; its temperature was always normal. It died (cause .-’) on July 9, 
1904; no trypanosomes or signs of trypanosomiasis were seen at an autopsy done 
four hours after death, and a rat sub-inoculated with its blood never became 
infected. 
Experiment 141.— Monkey ( Cercofitheeus schmidti ). 1 -rom July 15 to July 1 /, 
1905, 52 flies collected at the Coquilhatville sleeping sickness hospital fed on this 
animal. Its blood was regularly’ examined until October 14, 1905, when it was 
stolen. Trypanosomes were never seen in its blood, and its temperature was never 
abnormal. 
Kasongo. 
Experiment 182.—Monkey ( Cercopitheeus schmidti). !• rom January 19 to 
lebruary 7, 1905, 211 Hies fed on this animal. Its blood was frequently examined 
until July 24, 1905, when it was accidentally killed. No trypanosomes were ever 
seen (malaria present) during life, and no trypanosomes or signs of trypanosomiasis 
were present at the autopsy done three hours after death. 
Experiment 198.— Monkey ( Cercofitheeus schmidti). From February S to April 
'8, 1905, 2,659 Hies fed on this animal. Trypanosomes, probably Trypanosoma 
gambienst , were first seen in its blood on May 13, 1905. It gradually lost weig it 
and died of the disease in November, 1905. In March, two G/ossinae fuscae fed 
on this animal. 
Experiment 203.— Monkey ( Cercopitheeus schmidti). From February 22 to 
March 15, 1905, , i7 g 9 flj es f ec j on this animal. It was accidentally killed on March 
'6. Its blood was regularly examined ; no trypanosomes were seen during life 01 
at the autopsy. 
Experiment 213.—Monkey ( Cercopitheeus schmidti). From March 20 to April 
J0 - * 905 . 7*7 flies were fed. The blood was carefully examined up to July 5, when 
‘he animal was killed by its cage companions. No trypanosomes were seen during 
llfe °r at the autopsy ; nor were there any signs of trypanosomiasis. Two puppies 
sub-inoculated at the autopsy with respectively 3 and 5 c.cm. of blood never 
became infected. 
easih Ka < h sptcles of monkey used in these experiments has been show n ^ 
325 * 5*4 by Trypanosoma gambiense bs the inoculation of blood or cerebro 
Plna l fluid i*om sleeping sickness patients. 
Successful 
Experiment 
