164 



EGG FARM. 



stationary box, 7, which adjoins the tilt box. These 

 two boxes communicate by small exit apertures, 8 and 9, 

 cut in the ends of each box. These apertures recipro- 

 cate when the tilt box is horizontal, but ingress and 



egress is cut off when 

 the tilt box has tilted 

 half its journey. In 

 both Figs. 71 and 76, 

 a board flap may be 

 seen (the artist omit- 

 ted giving it a num- 

 eral), with its lower 

 edge curved, the flap 

 being attached to the 

 tilt box under the 

 aperture, 9. It fol- 

 lows that when the 

 tilt is partly accom- 

 plished, as shown by 

 the dotted lines, com- 

 munication between the tilt box and the stationary 

 box is cut off, so that the birds cannot return to the tilt 

 box until the tilt is completed and the box is on its 

 homeward passage and almost arrived at its original 

 level position. A flap attached to a tilt 

 box is shown more plainly in Fig. 1-41, 

 which also represents the best shaped 

 box that we have tried. The opening in 

 the box through which the chicks pass 

 in and out is made high enough above 

 the floor to allow for a layer of litter. 

 It will be noticed that the wirework 

 at the top is in the form of a door, 

 as previously explained, to facilitate 

 and putting in fresh occasionally. 



Referring to Figs. 71 and 76, the order of movements 



FIG. 68. CRANK WHEEL. 



FIG. 69. CRANK. 



litter 



