136 



TABLE I. 



Potato Scab (Oospora Scabies) Pot Cultures, 1913. 



.V = 7 gr. dried blood + 6.7 gr. nitrat soda per pot. 



P = 12.8 gr. acid phosphate per pot. 



KjSO; = 3.6 gr. sulphate of potash per pot. 



K CI = 3.6 gr. chloride of pota.sh per pot. 



Sulfur = 8 gr. sulfur per pot. 



Per cent, of scab is an approximation of the surface ol the tubers affeclod. 



