178 



POULTRY BREEDING AND MANAGEMENT 



Adjustable Open-front House. The wide open-front is 

 impracticable in sections where the temperature gets much 

 below zero. On the other hand, the curtain-front is im- 

 practicable for reasons stated. The curtain may be elimi- 

 nated by using a modified form of open-front. By de- 

 creasing the size of the opening, the same purpose will be 

 served as by covering the larger opening with canvas or 

 burlap. In a section where the minimum temperature is 

 zero, one side of the house may be practically all open. 

 In such a climate sufficient ventilation for fifty fowls will 



THE IMPROVED OREGON STATION PORTABLE HOUSE, ADMITTING 

 MORE LIGHT AND AIR 



be obtained by an opening 3x8 feet or 24 square feet of 

 opening equal to about one-half square foot per fowl. In 

 colder climates, with a temperature of 20 below zero, the 

 opening may be decreased to a fourth or a fifth the size. 

 A small opening in a cold climate will give better venti- 

 lation than a larger opening in a warm climate. In sum- 

 mer the opening should be larger than in winter. 



Space Required per Fowl. When poultrymen estimate 

 the capacity of their poultry house on the basis of so many 



