302 POULTRY BREEDING AND MANAGEMENT 



account was that of Reaumur, a Frenchman, who made and 

 used a machine in 1749. Development has been along 

 different lines than in Egypt and China. The monopolistic 

 tendency is absent; the effort is to place machines on the 

 market whose essential points are ease of operation and 

 availability to all poultry-raisers. In recent years, how- 

 ever, there is a distinct tendency toward centralized hatch- 

 ing where the business is turned over to large hatcheries, 

 and the poultrymen purchase the chicks as they come from 



BROODER HOUSE 



The chicks were loaded onto a wagon by the man who contracts to raise 

 them, taken two miles into the country and put in brooder houses shown above. 

 The farmer takes the eggs to the hatchery, where Mr. A., the hatcher, hatches 

 the chicks at so much per, and Mr. B. takes them and rears them at so 

 much per. 



the incubator. In place of incubators with capacities from 

 a few dozen eggs to two and three hundred eggs, there are 

 now machines with capacities of 3,000 to 10,000 eggs. 



The Incubator House. For successful hatching the 

 temperature of the room in which the incubator is operated 

 must be controlled within certain limits. The first require- 

 ment of an incubator room is a fairly even temperature. 

 The less the temperature varies, the more easily may the 



