116 POULTRY LABORATORY GUIDE 



Replace all broken hangers with new ones, and 

 see that all others are firmly fastened to the 

 brackets. 



Try all pet cocks to see if they will open easily 

 and are not choked with sediment. See that all 

 unions are properly packed and screwed tight. 



Lastly give all exposed pipes a good coat of 

 mica paint, which entirely prevents rusting and 

 greatly improves the appearance. 



EXERCISE XXXVIII 

 Miscellaneous Appliances 



An electric fan in the incubator cellar to keep 

 the air cool and fresh. It must be regulated to 

 a slow speed and not turned toward the machine 

 but upward toward the ceihng. 



A large dial spring balance for the weighing 

 of feed, eggs, etc. 



A thermostatic arrangement connected with 

 the heater drafts to regulate 'the brooder house 

 temperature. 



An automatic float attached to the cold water 

 inlet in the expansion tank, which giyes assurance 

 of an abtmdance of water in the system at all 

 times. 



Maximum and minimum thermometers in 

 incubator cellar and brooder houses. 



