16 Petroleum as Fuel. 
B, or retort, five inches in diameter, and closed at both 
ends, was placed, with a short tube, C, of two inches 
diameter immediately in front of it. Into this latter tube 
(which communicates with the retort)one end of the coil is 
inserted, and the other end, D, passing out of the furnace 
door, communicates with the reservoir of oil, being in 
this case the cask in which it was brought to market. The 
flow of oil is regulated by a stop-cock, MW, placed near the 
REFHRENCEHS. 
A. Coil of Pipe from the oi FUG.2 
Reservoir. 
8B. Retort or Mixer. 
C. Short Connecting Pipe. 
D. Pipe leading to Oil Reservoir. 
F Burners, 90 in number, 1-16th 
inch each. 
G. Steam Pipe. 
K & Hf. Steam Valves. 
HH. Oil Valve. 
NV. Tubes into which are screwed 
the Burners. 
P. Large Flue of Boiler. 
£ R. Smaller Flues of Boilcr. 
£ig.1. 
O00 O00 OOO OOO OOO 
005 OOO O00 OOO OOO 
IN E 
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furnace door. Some eight inches under the coil of pipe lie 
ten one-inch wrought iron tubes, JV, closed at one end, the 
other end inserted into the retort ; these tubes lie parallel 
to each other, and are two feet three inches in length, and 
into each of them is tapped nine cast iron burners, 7, with 
one-sixteenth inch opening, making in all ninety burners. 
An inch above the plane of the coil, a wrought iron pipe, 
G, proceeds direct from the short tube in front of the retort 
