118 Sir D. Bruce and others. Trypanosoma 



Chart 3. — Curve representing the Distribution, by Percentages, in respect to Length, of 

 500 Individuals of the Trypanosome of Naturally Infected Dog, Strain I, Dog 48, 

 taken on nine consecutive days from Eat 1218, after passing through a series of 

 eight rats. 



r^i L C T O TX s 



1 3 





f 5 



JO 



n 





19 



10 



1 1 



2-1 





IS 



26 



V 



28 





31 



32 ( 33 



34 | 35" 



30 



3 7 



58 

















































































































































































































































































































































































































































































































































































































































































































t 



























































































































































i 



















































^* 



































































































IS 



n 



(6 

 15 

 14 



ll 

 II 

 /( 



(0 



« 10 



i- 6 



5 

 2 

 I 



This curve still shows a markedly dimorphic type, but the proportion of 

 the long forms is increasing. 



The next curve shows the same strain at the beginning of 1914, after 

 passing for two years through a series of 46 rats. 



