FOREST PRODUCTS LABORATORY. . 



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The distiactive feature of the Forest Service water-spray kiln is the control of the humidity in the kiln 

 and, consequently, the drying rate of the lumber, by conditioning the air with sprays of water whose 

 temperature is carefully regulated. The experimental kiln shown is drying oak bolster stock, which 

 appears white because of the end dip used to reduce checking. 



