Bui. 852, U. S. Dept. of Agriculture. 



PLATE VII. 



Diagram for Use in the Design of Concrete Pipe 

 Lines. 



From the intersection of the diamotcr and C B follow guide lines to the 

 intersection of I 1 and V, or from the intersection of II and V follow 

 guide linos to the intersection of diamotcr and C a . No straight 

 edge repaired. For recommended values of C B , see page 7. 



