io6 



TRANSACTIONS OF WAGNER FREE INSTITUTE OF SCIENCE 



CATALYSIS IN THE INORGANIC FIELD 



ture, and a current of air passed in. When the process was over the air was shut 

 off before the tube was cooled. 



Air 



nuunnmuuwnmi 



^0 4» 





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CO 



. Screen CScreen ' 

 CoKC Briquettes 



Fig. 2. (Courtesy of Journal of Industrial and Engineering Chemistry.) 



Gas 

 ex'it if 



^T^z 



, ^\x\\i 1 



1,1 



Fig- 3- (Courtesy of Journal of Industrial and Engineering Chemistry.) 



lo. Diagram of Bucher's "continuous furnace" (Fig. 3), to avoid the destructive 

 effects of cooUng the briquets in producer gas. By simply passing the producer 

 gas into the briquet column at the base of the heat-zone, the cyanized briquets 

 are entirely away from the producer gas. The arrangement is such that either nitro- 

 gen or producer gas may be used. 



