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Oil Engines. 



by contact with the hot walls of the vapouriser, from which it 

 passes at F, Fig. 13, into the cylinder by a side passage into the 

 combustion chamber, which is of simple form. The oil is 

 supplied from a reservoir on the top of the cylinder by a small 

 pipe, in which is a finely adjustable supply valve G, Fig. 14. 

 From the same supply pipe a branch pipe H carries oil to the 

 lamp burner J, which gives a long Bunsen flame. This heats 

 the ignition tube K at the bottom of the vapouriser V and 

 the vapouriser itself, which is surrounded by a cylindrical wind 



Figs. 13, 14, 15. — The Campbell Oil Engine. — Vapouriser and 

 Ignition Apparatus. 



guard L. The lamp, Fig. 14, is of the vapouriser wickless type, 

 the oil to which is controlled by the valve M, from which it 

 passes the air vessel N to a vapourising bulb P, and escapes, 

 and burns at the jet J. The flame impinges upon the bulb P, 

 surrounded by a small conical funnel Q, shown by dotted lines, 

 which gives to the flame a columnar form, causing it to con- 

 centrate on the ignition tube K and the lower part of the 

 vapouriser. The lamp is started by lighting a small quantity of 

 oil allowed to flow from the jet on to a wrapping of asbestos yarn 

 on the jet pipe. All delicate governing of the oil or oil vapour 



