PLAN IN RESIN INDUSTRY 179 



Regulation through proper age classes and a suitable area allot- 

 ment should provide a continuous supply of resin, in keeping with 

 size and condition of forest. If bleeding takes only the stands and 

 trees to be logged in the near future, Regulation for the Resin 

 Industry simply runs four years ahead of that of the cut. But in 

 this case a definite area regulation becomes necessary, stands to be 

 tapped must be picked out at least five years before logging, bled 

 for four years and then turned over to logging. An area allotment 

 for ten years, revised every five years will answer very well ; to 

 prepare for long periods ahead is neither necessary nor advisable, 

 since uncertainties in the resin industry, dangers from fire, insect and 

 windfall are very great. If the Selection Method is used, area allot- 

 ment takes on the form of modified fixed yearly cut as outlined 

 above, and tapping is restricted to trees to be marked for cutting. 

 For this reason resin work should be preceded by a regular mark- 

 ing, which will avoid confusion when the trees are to be boxed or 

 gotten ready for cup and gutter. 



As regards the method of utilization of resin, the conditions 

 resemble those met in timber cutting ; it may be done by the owner 

 through day labor or contract, or else it may be sold on the stump. 

 Experience would indicate that this latter in the resin industry is 

 even less satisfactory and more dangerous to the forest than is the 

 selling of timber on the stump. 



4. Tan Bark and tan extract industry allies itself so closely 

 with the cutting of timber that little additional need be said. In 

 many cases, however, this is not true and the value of this industry 

 may even influence choice of species to raise and method of silvicul- 

 ture to employ. 



In Oak coppice the entire plan is often based on harvest of 

 bark, and in Chestnut stands utilization of the timber itself is modi- 

 fied, the wood is ground and tan extract supplies the chief income. 



Other secondary forms of utilization of the forest property 

 exist in different localities, and under various circumstances. Ordi- 

 narily their importance, income, permanence, etc., determine whether 

 it is necessary to consider them in the General Plan, and the few 

 illustrations cited will indicate their treatment. 



