PLANT DISEASE 



animals eating chlorotic food must be deficient 

 in sugar, fats and proteids. 



Max Verworn, General Physiology, p. 158, 

 says 



" The plant must construct the highly com- 

 plex proteid molecule out of the simplest 

 inorganic compounds, carbonic acid, water, 

 salts and oxygen, while the animal obtains 

 already formed the proteid food without which 

 it cannot live." 



But the proteids are only taken into the 

 animal economy by means of the foods eaten. 

 It follows therefore that if such foods be either 

 chlorotic vegetable foods, or animal foods 

 derived from animals fed upon chlorotic 

 vegetable food, the individual so fed must be 

 deficient in these necessary proteids. 



Chlorophyll, which is before every one in the 

 form of the green colouring matter of all forms 

 of vegetation, from the leaf of the oak to the 

 parsley leaf, is not of one constant standard. 

 " Iron is absolutely essential to the existence of 

 this compound, as chlorophyll cannot be formed 



