and have another (empty) incubator heated up 

 and ready, you can transfer the eggs to it, and 

 send for a plumber or tinsmith at leisure. 



Another peculiarity of the water tank is that 

 when the lamp does go out unexpectedly, either 

 by reason of neglect to fill or trim, or from the 

 clogging and sticking of the lamp trips used on 

 most hot water machines, and the water gets 

 cooled off, it takes a long time to get it heated 

 again ; whereas, the temperature in the hot air 

 reservoir can be raised from minimum to maximum 

 in oner-fourth the time. 



From the opening of the incubator exhibit at the 

 World's Fair, Chicago, until the day before it 

 closed, we had three hot air incubators there in 

 constant operation, hatching chickens. 



In the hottest weather all the other incubators 

 in operation in the building were obliged to put out 

 their lights at some period of the day, but the 

 lights on our machines were never extinguished, 

 from start to finish of the exhibition, except when 

 the gas fixtures in the building were being repaired 

 or altered by the authorities. A new guard once 

 extinguished the light on a hot water incubator, 

 about six o'clock in the morning, but as the oper- 

 ator arrived soon after, no harm was done. This 

 incident was made the stock of many good-natured 

 jokes on the guard, and the nucleus of several 

 funny newspaper paragraphs. A certain hot water 

 incubator concern (not the one whose light was 

 put out) has made it the subject of a grand fairy 

 tale, in which they make it appear that all the 

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