PRACTICAL ARBORICULTURE 389 
We may name thirty-five dollars per acre as entire cost of land and invest- 
ment. 
From this plantation we shall be able to sell, in seven to eight years, mine 
props, mine ties and timbers and fence posts; one million sticks, being two only, 
per tree, three-fourths of all trees being removed to give room for development 
to the remaining and permanent trees. 
No one can hesitate at placing a value of five cents each, net, upon this prod- 
uct, or fifty thousand dollars income at this time. Thus the entire cost will have 
been paid, and the land, with a permanent forest, remains for future development. 
From the experiences of the past, covering every portion of the United 
States, we may confidently expect to realize in cross-ties and timber in fifteen 
to twenty years, and with 170,000 permanent trees look for one million cross-ties 
at the expiration of the period. 
Averaging 60 cents, today, for inferior woods, cross ties may safely be 
estimated to be worth as much, or 50 cents each, net, fifteen years hence. 
An engineer can readily complete the estimate, and add, if he wishes, a con- 
siderable sum to the incidental expenses and yet be safe in final results. 
If trees are not planted, how are these articles to be obtained two decades 
hence? 
