DRIVEN MACHINES 121 



supply enough water so the irrigation may be 'done 

 quickly and with sufficient water to make it effective. 

 When the cost of the reservoir can be charged up to 

 the different departments of the business, such as irri- 

 gation, live-stock and house use, the cost is divided and 

 the profits are multiplied. 



Power Conveyor. Circular motion is converted into 

 reciprocal motion to operate a pump at a distance from 

 the engine. The short jack crank oscillates the driving 

 pulley to move the conveyor wires back and forth. The 

 distance to which power may be carried is limited by 

 the expansion and contraction of the conveying wires. 

 Wooden rods are better under extremes of tempera- 

 ture. Where an engine is used night and morning in 

 the dairy house to run a cream separator, this kind of 

 power transmission may be worked to operate the 

 pump at the house. Light wire hangers will support 

 the line wires or rods. They should be about three 

 feet in length, made fast at top and bottom to prevent 

 wear. The spring of a No. 10 wire three feet long is 

 sufficient to swing the length of a pump stroke and the 

 friction is practically nothing. 



ELECTRICITY ON THE FARM 



Electric current in some sections may be purchased 

 from electric railways or city lighting plants. But the 

 great majority of farms are beyond the reach of high 

 tension transmission cables. In some places three or 

 four farmers may club together and buy a small light- 

 ing plant to supply their own premises with both light 

 and power. Unless an engineer is employed to run it 

 trouble is sure to follow, because one family does all of 

 the work and others share equally in the benefits. The 

 solution is for each farmer to install a small plant of 



