causing Disease in Man in Nyasaland. 121 



Table VII. — Measurements of the Breadth of the Trypanosonie of Naturally 

 Infected Dog, Strain I, Dog 48. 



Date. 



Experiment 

 No. 



Animal. 



Number of 

 trypanosomes 

 measured. 



In microns. 



Average 

 breadth. 



Maximum 

 breadth. 



Minimum 

 breadth. 



1912 



1218 



Eat 



500 



2-90 



5-00 



1 25 



Table VIII. — Percentage of Posterior-nuclear Forms found among the Short 

 and Stumpy Varieties of the Trypanosome of Naturally Infected Dog, 

 Strain I, Dog 48. 



jy , Experiment 

 a e ' No. 



Animal. 



Percentage among short 

 and stumpy forms. 



1912. 

 April 22 



„ 25 



„ 29 



May 2 



„ 6 



9 



„ 13 



„ 16 



407 

 407 

 407 

 407 

 407 

 407 

 407 

 407 

 407 

 407 

 407 



Eat 



3 

 2 

 1 

 4 

 3 

 8 

 6 

 8 

 4 

 23 

 15 



„ 20... 





„ 23 





„ 27 









Average 



7-0 



Table IX. — Percentage of Posterior-nuclear Forms found among the Short 

 and Stumpy Varieties of the Trypanosome of Naturally Infected Dog, 

 Strain I, Dog 48, after passage through rats for seven months. 



Date. 



Experiment 

 No. 



Animal. 



Percentage among short 

 and stumpy forms. 



1912. 





Sept. 5 



1218 



„ 6 



1218 



„ 7 



1218 



„ 8 



1218 



9 



1218 



„ io 



1218 



„ 11 



1218 



„ 12 



1218 



„ 13 :.. 



1218 



„ I* 



1218 



Eat 



1 -3 



