RESTORATION AND TREATMENT OF FORESTS 19 



Furthermore, the practice of cutting the mature and 

 leaving the immature trees must necessarily bring about 

 a very irregular harvest. Trees left at the first cutting will 

 quite likely be of all sizes from seedlings up to a size 

 nearly large enough to cut, and the periods of their ma- 

 turity will vary accordingly. This will compel frequent 

 cuttings with varying yield. Therefore roads must be kept 

 up and mills with appliances for manufacture be main- 

 tained with but small product. Such a system would do well 

 for the farmer's woodlot, but would not be profitable as a 

 lumbering proposition. 



Finally, and by no means the least serious drawback to 

 selective cutting and natural seed-sowing, is the probable 

 failure of seeds to bring forth trees, even if they fall in 

 abundance in suitable places and at the right time, all of 



forests yield seventy cubic feet. The following table, copied from United 

 States Forest Service Circular, No. 140, entitled " What Forestry has Done," 

 will show the net revenues received by European countries, and also the 

 annual expenditures : 



Expenditures and revenues of national forests, showing higher productiveness 

 under larger expenditures 1 



1 Prepared from the latest available data. 



Deficit. 



