392 



BOARD OF AGRICULTURPl [Pub. Doc. 



ceeded in maintaining a higher temperature in the poultry 

 houses than is usually found in out buildings for live stock. 

 They have protected the fowls from the extremes of winter 

 weather. 



But the temperature is only a part of spring conditions. 

 In spring and summer fowls have, with the higher tempera- 



BUILDING USED IN J. H. ROBINSON'S FiRST CoLD POULTRY HOUSE EXPERIMENT. 



tures, abundance of air in the houses, and live nmch out 

 doors. The out-door temperature and the temperature inside 

 the house are not much different. In the house it is cooler 

 on a very warm d&y and warmer on a cool day, but the dif- 

 ference would rarely exceed eight or ten degrees either way. 

 In winter, if the house is to be kept at a much higher 

 temperature compared w ith tlie out-door atnjosphere than at 

 other seasons, the house must be shut up, and there must 

 })e MO free and rapid circulation of air between the exterior 

 and interior, excej)t when the out-door temperature is high ; 

 for free circnlation of air when the outer temyxn'ature is low 

 will reduce the temperature in the house to within eight or 

 ten degrees of the outside tenii)erature, and if the outside 

 temperatui'e is zero, or ten, twenty or more degrees below, 

 this makes the inside colder than, on the theory that the 

 house should be kept warm, is advisable. 



