with a value of twenty per cent, it is almost 

 alw^ays possible, by long search, to find an 

 occasional parasite or pigmented leucocyte. A 

 value of over twenty per cent, probably implies 

 actual infection at the time of observation. 



The Normal leucocyte values are :, — 

 Polymorphonuclear leucocytes, 65-70 per cent. 

 Large mononuclear „ I 



Intermediate „ j '^'^'^ " 



Small mononuclear ,, 20-25 " 



or lymphocytes 

 Eosinophil ,, 2-4 ,, 



Other forms of leucocytes, e.g., ' rnast ' cells, 

 are always in extremely small numbers in health 

 (o'5 per cent.) 



