HOW TO PLANT. 113 



have attained a height of twenty feet. The 

 trees thus removed from time to time will be 

 valuable for hoop-poles, vine-stakes, fence-poles, 

 and for many other uses. The remaining trees 

 will now have room enough in which to grow 

 for another term of years, when a further thin- 

 ning should take place. When the trees have 

 reached an average height of thirty feet, not 

 more than eight hundred should be left on an 

 acre ; and, when forty feet, not more than three 

 hundred or three hundred and fifty under the 

 most favorable conditions of soil and exposure. 

 Then the trees may be left to themselves, only 

 removing from time to time the dead or decay- 

 ing ones. As the successive thinnings take 

 place, the trees which are removed will be 

 more and more valuable for lumber on account 

 of their constantly increasing size. 



It is usual also with the most experienced 

 tree-culturists, in view of the anticipated thin- 

 nings, to plant various kinds of trees together 

 planting, for example, oaks, if the design is to 

 have the final forest mainly of this tree, sixteen 

 or twenty feet apart, and filling in the inter- 

 mediate spaces with other trees, such as the 



