THE ALTERNATE AND PARALLEL SYSTEMS. 



225 



reinforced by the collar at each joint, Fig. 

 35, is suitable for the first fifty feet at the 

 end nearest the attendant. The lever, if one 

 is used, should be six to twelve feet long, ac- 

 cording to the length of the axle. A winch, 

 Fig. 138, is preferable if the axle is long, and 

 the handle of* this winch should be strong 

 and made to be grasped by both hands. 



If there are ten or twelve tilt box apart- 

 ments attached to the same axle, they should 

 be 3 1-2x8 ft. and 2 1-4 ft. deep. If fifteen 

 or twenty apartments, they should be 3x10 

 ft. or 3x12 ft, according to the size of the 

 flocks ; for it is readily understood that the 

 narrower the tilt boxes, other things being 

 equal, the easier it is to rotate them. After 

 determining their width, you contrive the 

 width of the building and the location of the 

 posts, which last determines the size of the 

 stationary boxes or apartments under the call 

 cylinders. In Figs. 117 and 135 the tilt box- 

 is 3 ft. wide. Be sure to avoid making your 

 tilt boxes too wide. Use thin, light-weight 

 boards. 



In Fig. 117, and in all other instances in 

 the parallel system, the birds must enter at 

 the side of the tilt boxes, of course, as in 

 Figs. 131, 142 and 144. Also the tilt boxes 

 for brooder chicks should be rounded a little 

 on the front side. In Fig. 142, S represents 

 the stationary box, Y the yard out of doors, 

 T the tilt box, and J^a curved flap to shut 

 off ingress and egress at the opening between 

 T and S. Compare this cut with Fig. 73 

 and observe the dotted line, which shows the 

 half tilt and the full tilt. The feed cylin- 

 15 



