The Principles of Brooding. 



329 



When the air is quiet and warm, excessive heat can be partially 

 overcome by turning the vent pipe up to a vertical position. Then 

 the heated air is drawn out and the heat under the hover is reduced. 

 It is well to have all unions and joints very tight, otherwise the retarded 

 draught will allow the fumes to escape into the house. 



OTHER TYPES OF ' A -SHAPED COLONY HOUSES, AND THEIR USES 



There is a season of each year, usually in mid-summer, when extra 

 houses are needed to care for the growing pullets and cockerels. This comes 

 while it is desirable to retain the old fowls. It is at the time when all 

 of the brooders are filled and the earliest hatched chickens are out- 

 growing their quarters. Con- 

 gestion at this time is disas- 

 trous to rapid natural growth. 

 Overflow quarters at this time 

 are needed. When it is im- 

 possible or undesirable to take 

 care of the surplus chickens 

 in existing quarters a cheaper, 

 simpler, and cooler form of 

 " A"-shape colony house is sug- 

 gested. This house, although 

 of special importance for 

 summer use, can be used to 

 advantage during the other 

 seasons of the year as a 

 scratching room annexed to a 

 regular colony house. 



The most desirable type of several which we have tried is shown in 

 Fig. 105. Ventilation is provided from every quarter, makingthe house 

 comfortably cool during excessively hot weather. The clapboards on the 

 sides and ends are placed with their lower edges set out ^ inch from the 

 next clapboard and overlapping in such a way that storm cannot beat in. 

 The wire door aids in ventilation, allows the entrance of sunlight, and 

 makes the construction economical by saving glass windows and lumber. 

 In addition, ventilation is completed by the application of the English 

 style of raised ridge-board. The fact that these auxiliary houses are sim- 

 ilar in type lessens the difficulties of removing stock to strange quarters. 



A house with wire sides and ends did not prove so desirable as that 

 with clapboarded sides. The open construction did not sufficiently pro- 



FiG. 105. — An " A"-shaped summer house. 

 Note the raised ridge boards and loose clap- 

 boarding 



