ARTIFICIAL BROODING 243 



determining definitely what these temperatures should be. 

 General experience, however, agrees with the results of a 

 single experiment reported by LewisS in which he brooded 

 four groups of fifty chicks each in brooders where all con- 

 ditions were exactly alike, except that of temperature. 



Fig. 124 



Large colony brooder, coal heated. Capacity 600 chicks. 

 (Courtesy of Kansas Experiment Station.) 



The first brooder was kept very warm, having an average 

 hover temperature of 112° for the first twenty-eight days. 



' Thirty-second Annual Report, New Jersey Experiment Station. 



