30 PLANT DISEASE 



Specific gravity !O35% instead of 1055% 



Number of red cor- 

 puscles per cubic 



MM. i to 2 millions instead of 



4 to 5 millions 



Proportion of Haemo- 

 globin i to 2% instead of 12% 



From which it is evident that the deficiency 



is essentially a deficiency of haemoglobin." 



It being recognized that the haemoglobin 

 is the conveyer of oxygen in and through the 

 system, and the means of discharging car- 

 bonic acid from the system, we have here 

 distinct evidence that some human beings can 

 take twelve times as much oxygen into the 

 system and discharge twelve times as much 

 carbonic debris as others. 



In other words, one individual may provide 

 twelve times as much food for pathogenic 

 bacteria as others. Nor is this any proof 

 that this is the limit of the possible varia- 

 tion between extreme anaemia and a nor- 

 mal condition of the blood, for in the 

 vegetable kingdom a greater divergence in 

 the chemical constitution of food stuffs has 



