■Incubation 



1843 



easily is the temperature of the egg chamber influenced by the outside 

 temperature. The size of the incubator should be governed by the 

 number of chickens to be hatched each season, due consideration being 

 given to the possible desire to increase the number. 



DIRECTIONS FOR SETTING UP INCUBATORS 



When an incubator is received from the manufacturer, the first thing to 

 be done is to remove the crating and to place the incubator in the room in 

 which it is to be operated. A list of the different parts should be 

 checked with the parts in order to make sure that no mistake has been made 

 by the shipper. The detachable parts shovdd be removed from the incuba- 

 tor, and the legs should be fastened in place. The front legs should be 

 securely fastened first, and the machine should be raised to an upright 

 position; then the rear legs should be screwed on in the same way, and the 

 incubator should be placed v/here it is to be operated. 



The machine should be perfectly level in order to afford an even distribu- 

 tion of heat. In order to insure this, a spirit level should be laid on the top, 

 both crosswise and lengthwise. When the incubator is properly leveled, 

 small blocks of wood or pieces of shingle may be placed under the legs, 

 where necessary, in order to keep it in that position. 



The regulating device 

 The regulating device for most incubators consists chiefly of (i) a wire 

 connecting-rod, (2) a thumbscrew, (3) a counterpoise rod, (4) a coimter- 

 poise weight, (5) a regulator bar, (6) a thermostat, (7) a metal connecting- 



PiQ_ gg. — A common type of regulating device with the parts properly connected 



tube, (8) a base and pivot casting, and (9) a disk. (Fig. 55.) These parts of 

 the regulating device are named in the order in which they are numbered 

 in the figure, but they are discussed in the following paragraphs in the order 

 of their importance. The apparatus shown represents only one type of 



