THE GRAPE. 141 



through the pores of the wood, sustains growth. 

 But the descending, elaborated sap, which passes 

 down between the wood and bark, is arrested by 

 the cut, and concentrated in the 

 shoot and fruit. Fig. 14 shows the 

 enlargement above the cut, caused 

 by this arrest. Fruit is invariably 

 found to be not only increased in 

 size, but also hastened a week or 

 two in maturity. To a limited ex- 

 tent, and on scattering branches, 

 this experiment may be tried. But 

 it is evident that the eyes below the 

 cut will suffer for the following 

 year, and the vine itself would be 

 injured if the practice were general. 

 In addition to the directions pre- 

 viously given, which guard against 

 fruiting during the second season, 



i f i Fig. 14. 



a word, ot caution is necessary, lest 



the vines are overtaxed with fruit when they are 



young. Thin out the bunches as soon as they 



are set, and aim for a moderate crop of superior 



quality. 



VARIETIES. 



In 1820, Mr. John Adlum introduced the 

 Catawba, and the Isabella followed soon after. 

 These were the only well-known kinds at the 



