additional precaution to prevent scorching in case of failure of the 

 compressed-air supply, a reducing valve was also used. 



The slatted trays of cypress, 3 feet long by 2 feet wide, when placed 

 in the drier were so arranged that the alternate trays touched the rear 

 wall, leaving a 6-inch space in front, while the others touched the door, 

 leaving a 6-inch space in the rear. The air currents could thus cir- 



FIG. 1. Fruit dryer. 



culate back and forth through the drier, as well as through the trays. 

 The fruit, however, did not dry very evenly, because of the uneven 

 heating caused by the distribution of the steam coils. For drying 

 on a large scale the coils should all be located at the bottom of the 

 drier. 



[Cir. 57] 



