208 



MONTHLY JOURNAL OF AGRICULTURE. 



Fis- 3. 



Stafford's stationary dryer. 



is based covers the principle of drying on the 

 surface of cylinders ; and, as flour and meal are 

 not conductors, it is absolutely indispensable 

 that all the particles should come in direct con- 

 (448) 



tact with a heated surface, and should almost 

 immediately be exposed to a free ventilation, 

 that the moisture can escape. This can only be 

 done on the outside of a cylinder, for when done 



