Bulletin 1026, U. S. Dept. of Agriculture. 
Plate VI 
Fig= I. — Common Type of Division Box in which the Dividing Board 
is Movable and is held in Place by a Chain Hooked over Nails in a 
Cross Piece. 
Fig. 2. — Division Box on the Roberts Lateral 
of the Larimes and Weld Canal. The Divid- 
ing Board is Controlled by Wheels Work- 
ing on Threaded Rods Fastened to the 
Board. 
