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IRRIGATION FARMING. 



Capacity of Pipes. — To give a comprehensible 

 exhibit of pipe capacity and divscharge, the following 

 table has been compiled : 



CARRYING CAPACITY— GAI«l,ONS PKR MINUTE 



Some Simple Rules. — A miner's inch of water 

 is equal to nine gallons a minute. 



Doubling the diameter of a pipe increases its capacity 

 four times. 



A cubic foot flowing a second of time is equal to 

 fifty miner's inches, or 450 gallons a minute. 



A cubic foot of fresh water weighs 62.5 pounds and 

 contains 1,728 inches, or 7.5 gallons. 



27, 144 gallons of water will cover one acre one inch 

 deep. 



225 gallons a minute, or 25 miner's inches, will be 

 sufficient to cover one acre one inch deep in two hours 

 and one minute. 



A simple method to determine what a windmill 

 pump is discharging is to measure the acflual delivery 

 with a gallon measure for one minute and multiply by 



