2 BULLETIN 1203, U. S. DEPARTMENT OF AGRICULTURE. 
box to burn gas from the gasometer, were later removed. A set of 
slotted bar grates was installed, so that straw, wood, etc., could be 
effectively burned as fuel tor carbonizing the charge. 
Fig. 1. — E 
.rlington Experimental Farm. Va. 
Retort, Bcrubber, and gasometei 
The upright scrubber and condenser, 7 fee4 high and 2 feet in 
diameter, contained a quantity of water, above which were placed 
several fine-mesh screens and charcoal or coke. The cleaning cham- 
