FARM MOTORS 



PART II 



INTRODUCTION 



396. Motors. The application of power to the work of 

 the farm largely relieves the farmer from mere physical 

 exertion, but demands of him more skill and mental ac- 

 tivity. At the present time practically all work may be 

 performed by machines operated by power other than 

 man power. This change has been important in that it 

 has increased the efficiency and capacity of one man's 

 work. Farm Machinery has been a discussion of the 

 machines requiring power to operate them, while Farm 

 Motors will be a discussion of the machines furnishing 

 the power. The number of machines requiring power 

 to operate them is increasing very rapidly. They re- 

 quire the farmer to understand the operation and care of 

 the various forms of motors used for agricultural pur- 

 poses. 



397. Energy may be defined as the power of producing 

 change of any kind. It exists in two general forms : 



1. Potential or stored energy, an example of which is the energy 



contained in unburned coal. 



2. Kinetic or energy of motion, an example of which is the 



energy of a falling body. 



Sources of energy. Following are some of the sources 

 of energy available for the production of power. 



