21,1 Cole: Manufacture of Industrial Alcohol 27 
termined at certain time-intervals by titration with tenth normal 
hydrochloric acid. Litmus paper was used as an indicator, 20 
cubic centimeters of distilled water being added to the sample 
before titration. The results are shown in Table 10. 
Text fig. 1 shows the rate of loss of ammonia from Natalite 
fuel when exposed to the atmosphere. It is readily seen that 
a less-volatile alkaline substance than ammonia must be used 
as a neutralizing agent. Of the many possible compounds the 
100 
| 
| 
ae 
50 
40 
tee 
Loss of anmonia in per cent 
60 
10 20 30 
eee 
« 
oe 6: 5 00 128" 190: FS S00 7 bee ee 
Exposure in minutes. 
Fic. 1. Percentage loss of ammonia from Natalite fuel. 
only ones that are obtainable in large quantities and that are 
_ at the same time inexpensive are pyridine and aniline. 
The writer has tested both Natalite and Foster’s fuel in a 
Buick-Six model automobile. The shellac-coated cork float, was 
replaced by one coated with glue. The spark was advanced to 
30°. The air-fuel mixture was carefully adjusted. Table 11 
shows comparative results with these fuels. 
