CULTIVATION. 



205 



.The cross wires, T, must also be very strong. These 

 pass crosswise over the posts, or through hooks at the 

 heads of same, and serve as supports for the intermediate 



Fig. 49. — Frame system : vertical training. 

 (Verankerung = aiichdrs.) 



rows of head wires. The ends of the straining wires and 

 cross wires must be firmly anchored "in the ground in order 

 to impart the necessary degree of rigidity to the whole irame. 



