4 BULLETIN 125^ U. S. DEPi^BTME^NT OF AGEICULTUEE. 



of damaged grain, such as weather stauied, heat damaged, bin burned, 

 and ground damaged, was carefully noted. This same line of experi- 

 mentation was carried on at several representative points in order to 



Fig. 2.— a grain bleaching apparatus with square tower. This type is in very common use 

 throughout the Middle West. 



get the benefit of varying conditions. Acknowledgment of apprecia- 

 tion is made for the assistance and cooperation given by the owners 

 and operators of the elevators where experiments were conducted. 



