. Bulletin. Agriculture; Agriculture -- Arizona. 354 Annual Report Agricultural Experiment Station A few years ago pump irrigators had available an engine fuel oil of suitable quality, but of low cost. This oil has been called by various names, including tops and gas oil. Gas oils with a flash point of about 100° F. and with a gravity of about 44° B. were to be bought at five to six cents a gallon. Recently, while the price has been going up the quality has been going down. The tops now being furnished by many refineries is of about 37° gravity and is very troublesome in engines of the ordinar
. Bulletin. Agriculture; Agriculture -- Arizona. 354 Annual Report Agricultural Experiment Station A few years ago pump irrigators had available an engine fuel oil of suitable quality, but of low cost. This oil has been called by various names, including tops and gas oil. Gas oils with a flash point of about 100° F. and with a gravity of about 44° B. were to be bought at five to six cents a gallon. Recently, while the price has been going up the quality has been going down. The tops now being furnished by many refineries is of about 37° gravity and is very troublesome in engines of the ordinary type and size. Mean- while engine distillate has depreciated in quality until it is no better for irrigation pumping than was the gas oil of five years ago, altho the price is three times as great. The increase in cost is due in part to the fact that the engine distillate is classified as a finished product and therefore takes the same freight rate as gasoline. The Fuel Administration offers no relief. A few of the smaller oil companies continue to furnish a satisfactory tops at a reasonable price. Pump irrigators should demand an unrefined distillate of 40° to 44° gravity and with flash point under 120° F. This oil takes a low freight rate, and moreover the cost of refining will be saved. Unless some relief is obtained in this matter, pump irrigation will be more re- stricted and less profitable than has been thought hitherto. CEMENT PIPE FOR IRRIGATION PIPE LINES CEMENT pipe; failures Several important studies of cement irrigation pipe have been made during the past year. The study of failures of cement pipe was necessitated by failure. z-a'- SEiTlvetrf FORMS TfOT £D. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University of Arizona. Agricultural Experiment Station. Tucson : Agricultural
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