were told by a lady that she bought one of these 

 incubators shortly after the World 's Fair, under- 

 standing from the catalogue that it had such a 

 regulator, but found that there was no thermostat 

 in the machine. That she wrote to the makers 

 about it, and they told her that the party who made 

 them for them had failed, and they could not get 

 any more ; but thai she should remember that it was 

 not the regulator that hatched the chicks, but the 

 incubator. She said that she returned the machine 

 to its makers and asked for her money. We pre- 

 sume that she got it.} The bar is securely fastened 

 to the under side of frame which supports the tank 

 and on a level with the upper surface of the eggs. 

 At the unfastened end of the bar it connects with 

 lever and a brass rod, which opens and closes a 

 small ventilating tube. This ventilating cap is 

 easily adjusted by means of two little set- screws, 

 one above and one below the cap, on outside and 

 on top of tube, and can be set to open or close at 

 any desired degree of temperature in the egg- 

 chamber. With our regulator no rods or bearings 

 are attached to the outside of the machine. ( We 

 have not found any person who has yet seen them on 

 the inside.} We have known of serious accidents 

 occurring where the regulating attachments are 

 exposed to the meddling of children, and one 

 instance especially, where 600 nice eggs were 

 ruined two days before they were due to hatch by 

 a rat running over the top of the incubator and 

 dislocating the regulator. {Rats ! It is a case of 

 sour grapes. Notice later, in the fourth act, cata- 

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