FOlt SITTERS IX MILD CLIMATES. 83 



interval, sitters' first position (wide open and traps set). 

 Finally, after a still longer interval, the layers' nests to 

 third position (nearly full open) and then everything to 

 remain till the next afternoon. The whole program is 

 elsewhere more fully described. 



We now invite attention to Fig. 27, which is a ground 

 plan of the hatching house with its yards attached ; it 

 being an equivalent of an incubator cellar and an equip- 

 ment of 10 incubators of 300 egg capacity each, though 



FIG. 28. SECTION OF COVERED YARD. 



it costs much less and turns out more and better chicks, 

 with more certainty and less work. Y, Y represent large 

 yards and y, y, y, y small yards. The building is 11 1-2 

 ft. wide and 155 ft. long, or 144 ft. exclusive of the 

 rooms, m, at the ends, but the length is very materially 

 reduced in the cut to give space to show details plainly. 

 The small yards, 5 1-2 ft. wide, are roofed over for pro- 

 tection against sun and rain, but there is no air chamber. 



