56 POULTRY FOR PROFIT 



much time and strength. Saving labor is the heart 

 and essence of poultry keeping, and money that 

 saves it is well spent. 



Professor Brigham in "Progressive Poultry Cult- 

 ure" gives the following points which must be care- 

 fully considered in selecting an incubator: 



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 com- 

 plete control. 



3. It should be possible to ascertain and regu- 

 late easily the amount of moisture in the atmos- 

 phere of the egg chamber. 



4. The walls of the incubator should be suf- 

 ficiently 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 

 materials and carefully constructed. 



The Incubator Room 



Professor Brigham also makes these suggestions 

 as to the room in which the incubator is operated : 



"It should be held at 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 incu- 

 bators. 



"The room should be well lighted, so that all of 

 the operations, including the reading of the ther- 

 mometers in the egg chambers, can be conducted 



