374 STATE HORTICUL.TURAL SOCIETY. 



was purposely used in large excess. In one case nearly five grains of blue 

 vitriol were recovered from one pound of fruit — a dose no sensible person 

 would want to take in his food. Yet even that dose would not probably be 

 fatal, though it might cause vomiting. Any of the doses of arsenic or of 

 copper found in a pound of these fruits might be swallowed without 

 endangering life by such single dose. It is the repeated doses, day by 

 day, of such poisons that might produce slow poisoning and the gradual 

 undermining of the health without obvious cause. It is safe to refuse all 

 fruits which have been sprayed with these poisons (especially arsenic) 

 during the period of ripening. 



For a large part of the analytical work which forms the basis of this 

 bulletin I am indebted to my assistants, W. L. Rossman and H. E. Harri- 

 son. I am fortunate in having such able and faithful helpers. 



Agricultural College, ) 



September, 1893. \ R. C. KEDZIE. 



