Cultivation of the Hop Croi\ 



2G3 



To enable the substitution of cheaper forms of fuel — wood in the 

 Western States of America and coke in this country — various 

 patterns of stove kilns have been designed which have the com- 



Fig. 1.— Hop Oast-. F, fireplace ; AA,.drying floor ; C, cowl. 



mon property of a large area of heat-conducting surface by means 

 of which the drying air is heated before passing through the 

 hops; the stove is generally within the kiln and the products of 

 combustion are led through a complex system of iron pip» - below 

 the drying floor before passing to a chimney through which the 

 smoke, etc., is evacuated without passing through the hops. 



The " cockle " kiln, now obsolete, was the most primitive 

 type of these closed kilns. 



