112 CHICKS 



these problems Mr. Smith has devoted a g^reat amount of 

 study. He soon found that if the chicks were healthy and 

 comfortable they would not crowd into the warm comers. 

 He determined to have a uniformly warmed house, free from 

 drafts but thoroughly well ventilated. He has succeeded. 

 The writer was never in a more comfortable brooder house 

 — warm, no drafts and a plentiful supply of fresh air. The 

 ventilators are square boxes nearly a foot square that, run 

 up through the ceiling into the large air space above. 



This large air space is ventilated in turn by other air 

 shafts that extend through the roof. There are only a few 

 of these to the building and the manner of construction 

 may be seen in the accompanying photograph of the exterior 

 of the brooder house. The ventilating shafts in the lower 

 part of the house extend down to about one foot from the 

 floor, and are in every alternate pen. 



A Good Regulator Controls the Heat. 



The uniform heat which Mr. Smith is able to maintain 

 is due to two things. First, plenty of heating capacity in 

 the heating system; second, to an electrical regulating 

 device that Mr. Smith devised. The writer wishes he could 

 properly describe it, but is not sufficiently versed in me- 

 chanical and electrical terms. Briefly, a thermostat of hard 

 rubber and sheet steel is placed under the pipes. The ex- 

 pansion and contraction of this completes an electrical 

 circuit connected with a clock-like device that opens or 

 closes three drafts in the heater. This machine is so ac- 

 curate and sensitive that the heat can be controlled within 

 two degrees. That is, if a temperature of 90 degrees Fah- 

 renheit is wanted, the thermostat can be set so that the 

 temperature will never fall below 89 degrees nor rise above 

 91 degrees. This regulator can be adjusted so that it can 

 run the heat at any temperature by the simple turning of a 

 .screw. 



A second brooder house has been added to the first on 

 exactly the same lines except that the pens are nine feet 

 wide. 



Other Buildings of Simple Construction. 



The other buildings scarcely need description in detail. 

 "The sixty colony houses in use on this plant are nearly all 



