430 



POULTRY CULTURE 



It is generally conceded that hot water is the better heat for 

 incubating and brooding. It does not consume the oxygen 

 needed by the developing embryo. It is a mild heat that 

 diffuses a gentle warmth. 



It is estimated that an 1800-egg-capacity incubator can be 

 operated five weeks at a cost of only $3.15 when coal is $7.00 a 

 ton. The time for installation is estimated at one day, and 

 the time consumed in running it as two hours "a, day. It is 

 finally estimated to be 25 per cent, cheaper than the oil method, 

 as used in small machines. 



Fig. 163. — An electric alarm for an incubator. 



An Electric Alarm for an Incubator. — Mr. Walker has de- 

 signed a simple but accurate device to give an alarm when the 

 temperature goes too high in the incubator. If the incubator 

 is in the basement and you are sleeping, and the temperature 

 goes to 110° F., you have an alarm arrangement to save your 

 sitting. 



By referring to Fig. 163 it will be seen that the device con- 

 sists of an electric door-bell outfit, using the thermostat as a 

 switch. Take a strip of copper and cut it into shape and tack 

 it to the incubator; a strip of copper 3,^-inch wide and 2 inches 



