PROGRESSIVE POULTRY CULTURE 65 



SELECTING THE INCUBATOR. 



The modern hatching machines are of numerous pat- 

 terns but may be grouped in two classes, those heated 

 by hot water and those heated by hot air. The source 

 of heat in both classes Is usually a lamp burning petro- 

 leum oil. 



In selecting an incubator for his use the poultryman 

 may well consider carefully the following points: 



1. The heating system should be safe, of ample 

 power and under perfect automatic regulation, within 

 reasonable limits. 



2. The ventilating system should be capable of easy 

 adjustment so that the amount of pure air positively 

 supplied to the eggs may be under complete control. 



3. It should be possible to ascertain and regulate 

 easily the amount of moisture in the atmosphere of the 

 egg-chamber. 



4. The walls of the incubator should be sufficiently 

 insulated to prevent the influence of outside temperature 

 causing uneven temperatures on the level of the egg- 

 trays. 



"5. The machine should be made of first-class mater- 

 ials and carefully constructed. 



6. The poultryman should have the privilege of 

 personally testing the machine in operation, under the 

 conditions of his local surroundings, before the pur- 

 chase is finally concluded. 



THE INCUBATOR BOOM. 



The room in which the incubator is operated should 

 hold an even temperature and not be liable to sudden 

 fluctuations because of outside changes in the weather. 



Ventilation should be ample and under control 

 so that there will be no liability of strong drafts of air 

 striking directly against the lamps or the incubators. 



The room should be well lighted so that all of the 

 operations, including the reading of the thermometers 

 in the egg-chambers, can be conducted without difficulty 

 or discomfort so far as the eye-sight is concerned. The 



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