But. 1179, U. S. Dept. of Agriculture. 
Plate XI. 
Fig. !. — Positive Pressure Blower Furnishing Air to the Oil 
Burners Used in Connection with the Latest Phosphoric Acid 
Furnace at Arlington Experimental Farm. Va. 
Fig. 2. — View of Oil Tanks and Pumping Equipment, which Delivers the 
Fuel Oil to the Furnace at a Pressure of from 30 to 100 Pounds per 
Square Inch. The Amount of Oil Consumed Within A Given Period 
is Measured by the Gauge Shown on One of the Smaller Tanks. 
