1912.] Causing Disease in Man in Nyasaland. 425 



Table I — continued. 



Date. 



TSo. of 

 expt. 



Animal. 



Method of 

 fixing. 



Method of 

 staining. 



In microns. 



Average 



Maximum 



Minimum 



242! 12 

 24.2.12 

 24.2.12 

 26.2.12 

 26.2.12 



236 

 235 

 236 

 235 

 236 





Osmic acid 



Griemsa 



24- 5 



20 -9 



25- 4 

 22 -2 



21 -8 

 21 -5 



34 -0 



29 -0 

 32 -0 



30 -0 

 31-0 

 30 -0 



18 -0 

 18 -0 

 20 -0 

 18-0 

 16 -0 

 18 -0 













24 -1 



36 -0 



14 -0 



The average length of the trypanosome of the human trypanosome disease 

 of Nyasaland in man and other species of animals, taken from Table I, is as 

 follows : — 



Table II. 



Species of animal. 



No. of 

 trypanosomes 

 measured. 



In microns. 



Average length. 



Maximum 

 length. 



Minimum 





60 



23 -9 



30 -0 



18 -0 





100 



20 -6 



31 -0 



16-0 



Goat 



20 



24 -3 



28 -0 



21 -0 





60 



24-9 



29 -0 



22 -0 



Dog 



260 



24-2 



34 -0 



15 -0 





120 



22 -6 



36 -0 



14-0 



Eat 



600 



25 -1 



35 -0 



16 -0 



* Probably Cercopithecus pygerythus, the common grey, black -faced monkey ; native name 

 Pusi." 



