234 GREENHOUSES 



disregards loss by friction and, assumes that a 

 ram of the proper size is installed. 



By use of the table on page 235 an estimate 

 of the capacity of a ram for different con- 

 ditions may be determined. The left-hand 

 column indicates the number of feet of fall 

 possible to secure, and the numbers at the top 

 of the vertical columns indicate the height 

 to which water is to be raised. 



For example: Suppose we have a stream 

 with a flow of 100 gallons per minute; that 

 there is an available fall of 10 feet, and that 

 it is desired to raise the water 40 feet. The 

 factor in this case (252) will be found in the 

 column headed by 40 and opposite the num- 

 ber 10 under power head. Multiplying 252 

 by 100, we have 25,200, the number of gal- 

 lons that may be delivered per day by a ram 

 of the correct size. 



In ordering a hydraulic ram the following 

 information should be given: 



1. Flow of water in gallons per minute. 



2. Vertical fall in feet. 



3. Distance in which fall is obtained. 



4. Vertical height above ram the water 

 is to be raised. 



5. Distance water is to be forced. 



6. Number of gallons required per day. 



