EVOLUTION OF THE AUTOMOBILE. 



417 



supplied to the burner, and this supply in turn is regulated by the 

 pressure of the steam, so that the action is entirely automatic. The 

 cylinder H is a reservoir of compressed air, connected with tank I, so 

 that the gasoline is under pressure, and therefore is forced through 

 the pipe to the burner under the boiler. Between the burner and the 

 tank there is a valve controlled by the steam pressure, being opened 

 when the pressure is low and closed when it is high. When the pressure 

 reaches a certain point the valve is closed entirely, so that even if the 

 carriage is running very slowly, it is not possible to run the pressure 

 above the fixed limit. The exhaust passes from the engine cylinders 



Fig. 16. Engine of Cauuiagi: Shown in Fig. 14. 



into a muffler, from which it escapes into the pipe K. This pipe 

 projects downward into an opening through the center of the water 

 tank, and the draught produced thereby draws the gases of combustion 

 through from the top of the boiler to the under side of the carriage 

 body, where they escape into the atmosphere. 



Directly in front of the exhaust muffler is seen the water gauge, 

 which is in such a position as to be outside of the carriage body, as 

 shown in Fig. 14. A mirror is placed at the front of the vehicle, and 

 by looking into this the water gauge can be seen. Fig. 14 also shows 

 clearly the position of the operating levers at the side of the carriage. 



VOL. LVII.— Tl 



