58 Col. Sir D. Bruce and others. [Nov. 16, 



Experiment 214. — Monkey. 

 To ascertain if Glossina palpalis, caught on the Lake-shore, where there are no 

 natives, are capable of giving rise to Sleeping Sickness in healthy monkeys. 



Date. 



No. of flies. 



1 

 1 



Trjpano- 

 somes. 





Date. 



No. of flies. 



Trypano- 

 soxnes. 



TW"nlaTifl. 



Put 

 on. 



Fed. 



Put 

 on. 



Fed. 



1908. 











1909. 











Nov. 23 



21 



10 







T A 



Jan. 4 









+ 



„ 24 



26 



20 







i> 9 









+ 



„ 25 



60 



26 





+ 



„ 15 











„ 26 



30 



I 





+ 



„ 26 



A O 



154 







„ 27 





a 







„ 26 



OO 







+ 



>, 28 



96 



23 







„ 28 









+ 



„ 30 



1 



l^O 



41 





+ 



Feb. 2 



iUO 



bo 





+ 



Deo. 1 



150 



60 





+ 



., 3 



luo 



Wo 







2 









+ 



4 



lUU 



yo 







., 3 



— 



— 





+ 



■, 5 









+ 



» 4 









+ 



,, 6 



100 



85 







5 



60 



23 





+ 



» 8 



100 



82 







„ 7 



47- 



26 



— 



+ 



» 9 



200 



165 







„ 12 



60 



49 





+ 



„ 10 



200 



146 





+ 



14 



83 



37 







16 



200 



136 





+ 



„ 15 



78 



32 





+ 



„ 16 



200 



120 







17 



14 



6 







17 



170 



126 







„ 18 









+ 



„ 18 



200 



134 







„ 23 









+ 



„ 19 



200 



110 





+ 



„ 28 



80 



35 





+ 



„ 20 



200 



124 







„ 30 



70 



32 





+ 



22 



130 



98 

















23 



200 



140 

















i „ 24 



200 



142 

















1 „ 25 



200 



1.S5 

















„ 2(i 









+ 













Mar. 1 







+ 



+ 



Remarks. — 2500 flies were fed on this monkey for 98 days before a positive 

 result was obtained. 



Experiment 571. — jVIoukey. 



Date. 



No. of flies. 



Trypano- 

 sonics. 



Malaria. 



Date. 



No. of flies. 



Trypano- 

 somes. 



Malaria. 



Put 

 on. 



Fed. 



Put 

 on. 



Fed. 



1909. 











1909. 











Mar. 2 



200 



152 







Mar. 16 



200 



152 







„ 3 



200 



1.56 







„ 16 



100 



78 







4 



100 



78 







„ 17 



100 



74 







« 



160 



no 







„ 18 



100 



58 





+ 



9 



200 



120 







„ 20 



200 



112 







„ 10 



200 



no 







„ 22 







+ 



+ 



11 



200 



121 

















i?e»mr/cs.— Result positive. Infection probably took place on March 15. 

 This means that 1002 flies fed on this monkey before infection took place. 



