204 



I'Ol LTHY FliODVCTlON 



The labor of caring for one hundred egj^s in an nicul.atcr 

 is considerably less than caring for the same number under 

 hens. By the use of a properly disinfected mcnhat-.r it is 

 possible to start chicks out absolutely free fn.m Yerimii, and, 

 if brooders are used, to kee]) them so until nearly grown. 



Types of Incubators.— Incubators are usually classified 

 according to the medium used in transmitting the heat from 

 the heater to the egg chamber into "hot-air" and "hot- 

 water" machines. 



In actual efficiency there appeares to be no difference 

 between the two ty])es. Hot-air machines are more ((Uickly 

 but not more accurately regulated. While the hot-water 

 type is less sensitive to outside changes of temperature, 

 once affected it is much slower in regaining the proper 

 temperature. 



Fig. 99 



M ilnliinlll iii<:Llli;LtOr. 



lurtr^y (if K;m-as Agricull iir;il Kxpcrinn'iit 

 Station.) 



Incubator Sizes. — Most farm incubators range in capacity 

 from fifty eggs to four hundred and fifty. The sizes ranging 

 between one hundred and fifty and two hundred egg capacity 

 have trays that may be conveniently handled and are not 

 so large as to have great dilferences in tem])eratnre between 

 opposite sides or corners of the egg chamber. 



Where the capacity runs much above three hundred lliere 



