CHAPTER XXIII 

 THE MAMMOTH INCUBATOR AND BROODER 



With the, increased interest in poultry production in the 

 United States, there comes provisions for hatching chiclts in 

 large quantities. 



With the development of the times and modernization of all 

 things, there is a tendency to concentrate work and proceed 

 along economifi lines. 



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Fig. 159. — A view of a giant incubator: u, Expansion tanli; b, the coal heater. 



There has grown up in many localities custom hatching and 

 a baby chick trade. To furnish chicks in large quantities a 

 correspondingly increase in capacity for hatching must be pro- 

 vided, hence the development of the large incubator, which, 

 on account of its large size, has been called the giant incubator. 



The fact that when the chick is hatched the abdominal 

 cavity contains a part of the yolk-sac imabsorbed makes it 

 possible to ship the baby chicks long distances. These boxes 

 are provided with proper ventilation with no draft. 



Centuries ago the Egyptians and others hatched chicks in 

 large quantities in large ovens in which a fire was kept kindled. 



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