128 



Sir D. Bruce and others. Trypanosome 



Table XVII. — Percentages of Posterior-nuclear Forms found among the Short 

 and Stumpy Varieties of the Trypanosome of the Naturally Infected 

 Dog, Strains I, II, and III. 



Date. 



Experiment 

 No. 



Strain. 



Animal. 



Percentage among short 

 and stumpy forms. 



1912 



407 



I 



Eat 



7-0 



1912 



911 



II 





o-i 



1913 



2037 



III 



» 



o-o 



Comparison of the Naturally Infected Dog Strain with the Human, 

 Wild-game, and Wild Glossina morsitans Strains of the Trypano- 

 some causing Disease in Man in Nyasaland. 



Table XVIII. — Measurements of the Length of the Trypanosome of the 

 Human, Wild-game, Wild Glossina morsitans and Naturally Infected 

 Dog Strains. 



Strain. 



Number of 

 trypanosomes 

 measured . 



Animal. 



Average 

 length. 



In microns. 



Maximum 

 length. 



Minimum 

 length. 





5500 



Eat 



23 -5 



38 -0 



14-0 





2500 



>) 



22 -6 



35 -0 



15 



Wild &. morsitans ... 



2500 





22 -6 



35 -0 



15 -0 



Naturally infected dog 



1660 





25 -5 



37-0 



15 -0 



Table XIX. — Measurements of the Breadth of the Trypanosome of the 

 Human, Wild-game, Wild Glossina morsitans and Naturally Infected 

 Dog Strains. 



Strain. 



Number of 

 trypanosomes 

 measured. 



Animal. 



Average 

 breadth. 



In microns. 



Maximum 

 breadth. 



Minimum 

 breadth. 





1500 



Eat 



2-6 



5 -00 



1 -25 





1500 





3-2 



5-75 



1-50 



Wild Cr. morsitans ... 



1500 





2-9 



5-25 



1 -25 



Naturally infected dog 



1500 





2-8 



5 -00 



1 -25 



