SPECIAL FORMS FOR TRAINED TREES 



43 



the ordinary pyramid and is more precise in its de- 

 sign. Usually six arms are brought out at the base 

 of the tree. These are grown in a direction approxi- 

 mately horizontal until they reach a convenient length, 

 say two to three feet. They are then suddenly bent 



FIG. 15 PEARS IN DOUBLE U-FORM 

 From I^oebner's " Zwergobstbaume" 



upward and inward and are conducted along wires 

 set for this purpose until they meet in a common point 

 with the main stem of the tree some four to eight feet 

 above where the branches put out. There is thus 

 formed a precise mathematical pyramid, Along these 



