BROILERS AND ROASTERS. 6t 



There must be a circulation of air, but not so rapid as to 

 reduce the inside temperature so that the machines will be 

 affected. A good rule to observe to secure this is to- 

 ventilate as little as is necessary to keep down the odor. 



36. Running the Brooders. — The commonest faults 

 in the construction and operation of pipe brooder houses 

 have been insufficient heating capacity and lack of air 

 under the hovers. To the first of these causes responsibil- 

 ity for the other may be assigned. Operators tried, and- 

 many still try, to get along with the smallest possible 

 heater, and to economize heat by closely covering the space 

 under the pipes. Many of* the most successful growers 

 today either use no covering on the pipes, or use it only 

 for a few days when the chicks are very small. With, 

 heaters of greater capacity they can make the space under 

 the pipes as warm as need be without shutting it up 

 closely. Thus the chicks are kept warm, and at the same 

 time have abundance of air. The electric regulators in use 

 are placed under the pipes and connect by wires with a 

 damper in the heater, and also with an alarm bell withirt: 

 hearing of the operator at his house. Within a range of a 

 few degrees the regulator controls the damper on the 

 heater, opening or closing it as the temperature falls or 

 rises. Should a variation beyond its power to control 

 occur, it gives notice to the operator through the alarm 

 bell. It would be difficult to overestimate the practical 

 value of this little mechanism to growers of broilers and 

 roasters, relieving them of both work and worry in con- 

 nection with the maintaining of the temperature of their 

 brooders. 



It is of the utmost importance that the chicks, during; 



