Fuel Oils for Pump Irrigation 



415 



SI 



10 20 30 40 50 60 70 80 90 100 



PERCENT DISTILLED 

 Fig. 3. The boiling ranges of three different shipments of California tops, or gas oil. 

 The lowest curve represents the best of the three oiln. The oil began to distill at 250'' F. 

 and the distillation was 50 percent complete when the temperature reached 34.3'' F. Our^-e 

 No. 2 represents a gas oil, the volatility of which was near the lower limit for the ordinary 

 electric-ignition engines in common use thruout Arizona. No. 3 was an oil which was very 

 troublesome in use. 



fi. 



10 



20 



30 



70 



80 



90 



40 50 60 



PERCENT DISTILLED 

 Fig. 4. The boiling ranges of three samples of kerosene. The curves of No. 1 and 

 Ko. 2 gas oils are shown (in dotted lines) for comparison. The kerosenes in the Tucson 

 market are approxiumtel.v ot the same volatility as a low-grade tops, or gas oil. 



