202 FOMSTS WOEEED A TIRE M AlEU. 



the beginning of each Period, the separate treatment tequired hf 

 each such canipartment so as to turn it to good account. The Special 

 Scheme should also endeavour to bring about the necessary har- 

 mony between the various compartments composing the Block, but 

 ■without rendering necessary any great sacrifices in order to attain it. 

 It is impossible to foresee all the various special circumwtancea 

 that one may have to deal with in orgatnising these irr8gular forests. 

 The student will gather from the annexed example, which we have? 

 expressly drawn up, some idea of the principal difficulties to be en-- 

 countered in this work, and of the combinations by which it i» 

 often possible to satisfy the req.ulrements of an effective treatment, 

 as well as at the same time to realize, within the measure of the 

 possible, the principal benefits to be derived from a good Organisa- 

 tion Project. 



Given a Working Circle stocked with oak, beech, hombeam,. 

 and other broad-leaved species ; area 5000 acres. Suppose that the 

 Kotation suited for the forest, when it has> been regularised, is 180' 

 years, and that this figure is adopted as the basis of the General 

 Working Scheme during the regularisation. Granted also that it 

 has been ascertained that no crop of this forest ought to be exploit- 

 ed before it is 160 years old, at which age the oak acquires, under 

 existing conditions, a diameter of 26 inches, or after it has reached; 

 the age of 200 years, when the trees begin to decay. We will/ 

 further suppose that the configuration of tho ground and the dis- 

 tribution of the crops have led to the formation of five Blocks as 

 shown in the subjoined Tabular Statement. 



