78 POPULAB EEEOKS. 



with new wood; for every gardener knows that the 

 graft never changes the wood of the stock" 



This subject of the mutual influence of the 

 graft and stock is treated in another chapter, and, 

 as will (here be shown, certain erroneous beliefs 

 concerning the direct influence of the graft on the 

 stock, as well as the supposed presence of rootlets 

 passing down the trunk from the buds to the 

 ground, arise from the failure to understand the 

 fact that it is merely nourishment, and not vegeta- 

 ble tissue ready formed, which is conveyed from 

 place to place in the plant. All growth takes 

 place by the division of cells, and their increase in 

 size, and these cells have no power to move, but are 

 as fixed in their places as are the bricks in the wall 

 of a building. 



