THE ARTIFICIAL SEASONING OF TIMBER 



399 



the timber on trolleys, and charging these into the compartment with the 

 thinner material all to the discharge end. This thinner material will 



A.B.C THERMAL CIRCULATION KILN. 

 fERtTHS AUTOMATIC MOIST AIR DRYER) 



Dry Ti^mher 

 Oo/-/e/- E/7C^ 



Oreen 



T/mSer 



f.r77rance^ 



Diagram of Thermal Circulation Progressive Kilx. 



naturally dry more quickly than the rest, so that it can be taken out 

 earlier, a longer time being allowed for the thicker plank. 



Erith Moist Air Progressive Kiln at the Leyland Motor Co.'s Works, 



DRYING I -INCH WaLNUT FOR AEROPLANE PROPELLERS. 

 (Photograph by permission of Leyland Motors Ltd.) 



Another hvbrid arrangement is to divide the long compartment into 

 three or more sections or zones, by means of doors or curtains, different 



