CtTLTIVATION. 



243 



adapted to the kind of fuel used, and giving a readily con- 

 trollable fire. The furnace gases are made to take a sinu- 



Fig. 70.— The Gasch hop kiln. 



OU8 course, by the arrangement of the flues, around a system 

 of ten heating conduits, c, of quadrangular section, and thence 

 into the smoke stack. 



