428 



Col. Sir D. Bruce and others. Trypanosome [May 24, 



Chart 1.— Chart giving Curve representing the Distribution, by Percentages, in respect 

 to Length, of 1220 Individuals of the Trypanosome of the Human Trypanosome 

 Disease of Nyasaland. 





Microns. 







15 



16 







19 



20 



21 



ZZ 



23 







26 



z~L 



Zd 



29 





31 



32 



33 





35 



36 



37 





10 



it 



o 6 



£s 













































































































































































































































r 





\ 















































V 











































V 

















































/ 









X 























































































3 

 Z 

 I 



























































































V 























7 



















































J 

















































This curve is made up of measurements from 60 specimens of trypano- 

 somes taken from man, 100 from the monkey, 20 from the goat, 60 from the 

 sheep, 260 from the dog, 120 from the guinea-pig, and 600 from the rat. 



Table IV. — Measurements giving the Average Distance from the Posterior 

 Extremity to Micronucleus, Micronucleus to Nucleus, etc., in 1220 

 Individuals of the Trypanosome of the Human Trypanosome Disease of 

 Nyasaland. 



Posterior extremity 

 to micronucleus. 



Micronucleus 

 to nucleus. 



Diameter of 

 nucleus. 



Nucleus to 

 anterior extremity. 



Magellum. 



Short and stumpy (14 to 21 microns), 620 individuals. 





1-4 



4-4 



2-7 



10 -o 



0-6 



Intermediate (22 to 24 microns), 224 individuals. 





1-6 



5-6 



2-9 



9-3 



3-7 



Long and slender (2 



5 to 36 microns 



), 376 individuals. 





2-0 



6-3 



3-1 



10-4 



5-8 



The measurements are made < 



dong the curve 



of the long axis 



of the body 



of the trypanosome, and therefore if an oval nucleus is lying transversely to 

 the long axis of the trypanosome, the measurement given will not represent 

 the greatest length of the nucleus. 



