PLATE XI 
Fig. 6. Thresh Steam Disinfector on 5-ton Foden Steam Lorry. Each of the two chambers 
measures 3 feet 7 inches across by 6 feet deep (60 cubic feet). 
Fig. 7. Washington-Lyon Steam Disinfector. Made in three sizes : 30 inches diameter 
x 60 inches long, 36 inches diameter x 72 inches long, and 36 inches diameter x 84 inches 
