130 CULTURE OF THE GRAPE. 



winter. It is true, a vine with the two arms can be bent 

 backwards to the ground, so that the trunk and the arms 

 can be covered ; yet it is not an easy process, and will 

 require more of a bank of earth to effectually cover the 

 trunk than can well be spared from the roots. The prin- 

 ciple of the system may be entirely preserved with a 

 single arm, as is represented in fig. 25. It may be sug- 



Fig. 25. 



gested, that, if but one arm is used, it would be necessary 

 , to have it about equal in length to the combined length 

 of the two arms; and that, consequently, the extreme end 

 of the single arm would suffer, inasmuch as the upright 

 shoots are strongest near the base. It is true, that, if an 

 upright shoot starts at the bend of the arm, it will receive 

 more than its proportion of vigor ; but, when the sap is 



