12 



need a special lamp for high pressures. This explains the poor 

 showing made by alcohol at high pressures as indicated by the 

 curves. 



A single test with a larger opening in the end of the generator 

 tube and a hood to aid in generation gave 3505 candle power 

 hours per gallon of alcohol at 33 pounds pressure as shown in 

 Plate III. This shows graphically the maximum number of 



Lamp No. 5 A pressure lamp which operated successfully with alcohol and 

 gasoline. This lamp, as all others, was tested without a shade. 



candle power hours per gallon of fuel obtained with each lamp 

 tested. 



Mention is to be made of the fact that the lamps using gaso- 

 line or alcohol produced a hissing noise which, however, was not 

 objectionable in any case except with Lamp No. 5 with high pres- 

 sure on fuel tank. Even this would not be noticed in factories 

 and around machinery. 



