U. S. NATIONAL MUSEUM 
BULLETIN 102, PART I PL. 6 
Bennington Coke Pile. 
Earliest American method in the coking of coal, supplanted by the inclosed oven of the beehive type. The procedure started with an open heap of coal 
provided with a system of draught as shown in the portion removed. The fire was kindled under the vertical flues and combustion was kept smoth- 
ered by banking with powdered coal. From a model in the coal products exhibit of the United States National Museum. 
