Grade. 

 Date.. 



EXERCISE 23 

 THE INCUBATOR LOCATION, CONSTRUCTION, AND OPERATION 



Whenever possible each student should run one machine for an entire 

 hatch in addition to performing this exercise. 



Object. To become familiar with the various types and sizes of incu- 

 bators, to determine the principles of heat distribution and control and to 

 become familiar with the details of operation. 



Equipment. As many representative types of incubators as it is possi- 

 ble to secure; include, if possible, mammoth and individual machines, of both 

 hot air and hot water types. 



Procedure. Step 1. Make a list of all machines to be studied, re- 

 cording name, size, cost, and method of heat distribution (air or water). 



Incubators Compared 



Step 2. Examine each machine, noting its external appearance, apparent 

 durability, finish, material, and design. 



Step 3. Open the machine and examine interior construction, learning 

 name and arrangement of parts. 



Step 4. Examine the source of heat, whether lamp or stove. Trace the 

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