Fuel Oils for Pump Irrtcation 423 



Florence district is only 225 miles, and to reach the heart of the pump- 

 ing- district in Pima County 300 miles. At the present time the only 

 cheap electric power in Arizona is the hydro-electric power of the Salt 

 River Willey. It is believed that hydro-electric power in this State 

 will be increased s^reatly as soon as capital becomes available at a 

 moderate rate of interest. 



CONCLUSIONS 



SUPPLY 



1. An adequate supply of gasoline and kerosene appears to be assured, 

 at least for a year. Long time forecasts aro impossible. 



2. Engine distillate, gas oil, and twenty-seven-plus — the oils most 

 used for pump irrigation — are 1 c"ng withdrawn from the market 

 in California. A new source of supi)ly, of much promise, is the 

 north Texas and Oklahoma field. 



3. Contracts for the year's oil supply should be made during the win- 

 ter by each dealer and by each farmer. 



PRICK 



1. The price of gasoline will fluctuate constantly with changes in the 

 demand and in the production. 



2. Kerosene likewise will fluctuate in price, but it should be cheapened 

 somewhat by a reduction in the present freight rates. 



3. Gas oil is likely to remain at about the present price level. Any 

 further increase is sure to curtail the volume of oil used in pump 

 irrigation, and this will tend to maintain a stable price. 



4. The price of diesel engine fuel will always approximate that of 

 boiler fuel oil and will be considerably less than prices of the 

 lighter oils. 



5. Steam power plants, using boiler fuel oil or coal, cannot furnish 

 power at a cost low enough for pump irrigation districts. 



QUALITY 



1. With increasing demand, the tendency is to force the quality 

 downward in gravity to the heaviest grades tliat tlie respective 

 engines can burn. 



2. Fuel oils should be purchased with specifications. The specifica- 

 tions given on page 418 are recommended for California gas oils 

 for the present. Specifications for diesel fuel oil can be based on 

 the data in the table on page 410. 



3. Heavy users of fuel oil should have testing equipment. The Agri- 

 cultural Experiment Station will continue to make tests for farmers 

 to a limited extent. 



