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POULTEY CtTLTURB 



applied to incubation it can only be secured by automatic 

 protection of the eggs against overheating. 



Each egg chamber may be considered a separate incubator, 

 with its own heating system. Each sitting of eggs is started 

 whenever an egg chamber is empty and it receives only the 

 heat it needs, and securing it directly from the main supply 

 without having to pass through any other egg chamber in such 

 systems as used by the Candee, where by a set screw each 

 chamber is regulated to its desired temperature. In some other 

 makes the pipes run directly through all of the chambers, and 



Fig. 161. — View of the egg and nursery tr 



in a small giant incubator. 



a special regulating device is constructed on each chamber to 

 properly regulate the temperature. 



The mammoth incubator is made up of a series of units or 

 compartments, with one common source of heat — namely, a 

 coal-burning hot-water heater. 



In Fig. 160 the top of one of the compartments is cut away to 

 show the automatic heating system and the coil of pipes from 

 which heat is radiated. The illustration shows the heater with 

 its automatic draft regulator (c) and the large covered supplj' 

 pipes (d) located under the machine, and a small supply pipe 

 (e) for a 300-egg compartment. In the smaller pipes the 

 direction of the course of the warm water is indicated by the 



