Strom EVER, Chemical Gas Was/dug Apparatus 



INLET OUTLET 



/ \ >^^ 



WL. 



W.L. 



<-<;^ 



Although with a reasonable height of fluid in DD 

 circulation through CC is possible, even if BB is level 

 with X, yet in practice it was found that at the start of 

 an operation the gas would prefer the shorter path ; for 

 this reason, BB had to be made in the shape of a loop 

 about three or four inches deep. 



