At the top front of the boiler housing is located the 

 throttle, actuated by twisting the handle bar. Twisting 

 the bar in the reverse direction actuates a friction brake 

 against the rim of the front wheel. Heavy tubing leads 

 from the throttle to the steam chests of the cylinders. 

 Tubing also leads to a gauge located at the front of the 

 frame. 



The water supply for the boiler is contained in a tank 

 constructed in the shape of a saddle. The filler opening 

 is at the front of the tank, while tubing leads from the rear 

 bottom to the hand pump and the feed-water pump. 



A study of this interesting early self-propelled vehicle 

 reveals its builder as a man of ingenuity and an accom- 

 plished machinist. 



Figure 24. — Roper steam velocipede, showing cylinders, valve chests, and 

 feed-water pump on left cylinder. 



35 



