The  Hills  Experiments, 
307 
X 2 
Fig.  1. — Influence  of  the  Iodides  of  Manganese,  Potassium,  Sodium,  and  Lithium  on  Wheat,  1903. 
,,  Untreated.  B,  Manganese  Iodide,  c.  Potassium  Iodide.  D,  Sodium  Iodide.  E,  Lithium  Iodide. 
