116 FOR BETTER CROPS 



With gasoline at 20 cents per gallon, and with a very extrava- 

 gant engine, it should not cost more than two and a half cents 

 per hour for each horse power used. The interest, taxes, and 

 depreciation would be about the same as for a horse when in 

 use, but when not in use the engine does not depreciate and the 

 horse does. Again, when not in use, the engine does not eat 

 anything, while the horse eats nearly as much as when in use. 



It is quite difficult to compare the cost of using the horse 

 with the use of gasoline engines, as neither one is ever used all 

 the time, but it may be of interest to make an attempt at the 

 exact figures. 



What the Tests Show — The department of agricultural 

 engineering at the University of Nebraska has made tests of 

 pumping with a 3-horse power gasoline engine and found that it 

 takes one gallon of gasoline to pump 2, 454:. 5 gallons of water from 

 a well 43 feet to water, and that one gallon of gasoline will pump 



l,720gallons of water from a well 159 feet to water. A gallon of 

 gasoline should pump sufficient water from a well 43 feet deep to 

 supply 300 head of cattle 24 hours, and it should pump sufficient 

 water from a well 160 feet deep to supply 215 head of cattle 24 

 hours. The same engine referred to above shelled 28 bushels of 

 corn in 26 minutes and used .105 part of a gallon of gasoline. 

 This shows that one gallon of gasoline will shell 264 bushels of 

 corn. 



The men, in making this test, did not stop with slielling the 

 corn, but kept on and ran the corn through a feed grinder at 

 tl e rate of 29^ bushels an hour, and found that a gallon of gaso- 

 line would grind 48.6 bushels of corn sufficiently fine for good 

 feed. 



These same men found that it took .0893 gallons of gasoline 

 to run the engine empty for one hour, or .001489 of a gallon to 

 run the engine one minute. It takes about one minute to sep- 

 arate one cow's milk, and requires about -f^g-horse power to run 



